When your car jerks when accelerating, it can be an uneasy feeling and leaves you wondering if there’s anything wrong with the car. Cars are designed to run smoothly under almost any condition and for a long period of time.
A car jerking or hesitating under acceleration could mean any number of problems, from a faulty spark plug to a transmission problem. We’ll discuss further what a jerking car feels like, what the possible causes are, and potential repair costs.
- Car Jerking Under Acceleration
- Main Causes And Repair Costs
- Car Jerking At Different Speeds/Scenarios
- Automatic Transmission Jerking
- Final Conclusion
- Frequently Asked Questions (FAQs)
TL;DR, there are several likely causes of why your car is jerking under acceleration (which we’ve detailed further below):
- Dirty or faulty fuel injectors
- Bad fuel pump or blocked fuel filter (for more insight, check out our guide on the signs of a fuel pump going bad)
- Compromised fuel lines
- Malfunctioning spark plugs
- Moisture in the distributor cap
- Blocked air intakes
- Faulty MAF (mass airflow) sensor
- Worn-out accelerator cable
- Clogged bad catalytic converter (you can learn more in our guide on can a bad catalytic converter cause a misfire as well as the 2011 Equinox catalytic converter recall)
- Glitchy TCM (transmission control module)
- Problematic carburetors (which you can solve by learning how to clean carburetor)
Most cars will run smoothly with no problems over their lifetime, so it’s normal if you’re not sure what a car jerking during acceleration feels like.
Car Jerking When Accelerating
If you’re still unsure about what’s going on in your car, we’re here to help you understand what it actually feels like when this problem occurs.
A car jerking usually feels like the car is hesitating during acceleration, even under full throttle. Try putting your foot down and then pay attention to the rev counter. A healthy car should have its RPM climb up the rev counter smoothly with no problem.
If your car is jerking, then often the rev counter would stop climbing for a second or two, and then starts to climb again. Depending on the cause, your car might also backfire and you would hear a firing sound from your engine. Often it will repeat this process several times during acceleration.
Needless to say, if your car jerks when accelerating, it can be unsafe to drive. The reason is that if you’re accelerating from a full stop, it can be difficult for you to gain any speed. And if your car is already moving and you have this problem, then maintaining speed can be difficult.
When a car has this problem, it’s often engine or drivetrain related, so your check engine light might come on as well. It would be wise to take your car to a mechanic as soon as possible and get the problem solved. Driving with this problem can be dangerous, as it would be difficult for you to control your car’s speed.
Why Does My Car Shake When I Accelerate
Before we get into the possible causes of this problem, we’d like to note that you might be the problem. Yes, you. Okay, what we mean is that if you’re driving a stick shift (and understand how to drive manual) and it’s your first time driving it, or maybe you haven’t driven a stick shift in a long time, your gear change may be the issue here.
Your gear shifting might not be as smooth as the car needs it to be, causing the car to jerk as you shift gears and drive along. You should learn more about how to drive a stick shift properly if you think your driving might be the issue.
However, if you’re sure of your driving skills or your car is automatic, there are several common causes for car jerking.
Car Jerks When Accelerating: Diagnostic Chart
Also, if you need a table to quickly diagnose or figure out what to do next, here’s a summary of what we’ll discuss in greater detail down below:
| Car Jerks When Accelerating (Causes, Reasons, Symptoms, Fixes) | |||
|---|---|---|---|
| Underlying Causes | Reasons Why It’s Happening | (Other) Common Symptoms | Fixes And Costs |
| Dirty Fuel Injectors | Unable to provide a steady supply of fuel to the engine | Cylinder misfires, poor performance, lack of power, delayed response | Cleaning using a fuel injector cleaner ($50 to $100) |
| Bad Fuel Pump | Not able to pump the right amount of fuel into the engine | Poor starting, stalling while driving, lack of performance, engine surging | Full pump replacement ($250 to $1,000) |
| Dirty Fuel Filter | Clogs and limits the supply of fuel leading to the engine | Difficulty starting, cylinder misfire, rough idle, poor performance, stalling | Brand-new filter ($165, including labor) |
| Damaged Fuel Lines | Loss of fuel pressure, causing the engine to starve of fuel | Higher fuel consumption, strong smell of gasoline, fuel leakage | Fuel line replacement ($120 to $500 or more) |
| Faulty Spark Plugs | Too weak (or no spark) to properly ignite the air and fuel mixture | Rough idling, unable to start, cylinder misfiring, bad performance, lower MPGs | New spark plugs ($20 each, if you DIY it) |
| Moisture In Distributor Cap | Can’t send high-voltage electricity to the ignition system | Check engine light, unable to turn over the engine, rough idling, stalling | Thermal cover or parking inside to slowly remove the moisture |
| Blocked Air Intake | Prevents air from properly feeding into the combustion chamber | Poor fuel economy, cylinder misfires, poor performance, black exhaust smoke | New air filter ($80 to $1580), or a new intake system ($500 to $1,000) |
| Faulty Mass Airflow Sensor | Misinforms the ECU on how much air is entering the engine | Check engine light, difficulty starting, hesitating acceleration, poor MPGs, rough idle | Replacement MAF sensor ($250 to $400) |
| Worn-Out Accelerator Cable | Won’t open the throttle enough to let enough fuel into the engine | Slow acceleration response, cruise control not working, high or low idling speeds | Accelerator cable replacement ($150 to $350) |
| Clogged Catalytic Converter | Causes exhaust gases to build up past the engine | Bad performance, lack of acceleration, darkened exhaust smoke, rotten egg smell | New catalytic converter ($900 to $2,500) |
| Bad Transmission Control Module | Unable to properly regulate the transmission’s gear changes | Can’t downshift, issues with shifting into higher gears, hard shifting, poor MPGs | Reprogramming or full replacement ($500 to $900) |
| Defective Carburetors | Can’t control the amount of air and fuel sent into the engine | Lacking performance, black exhaust smoke, cylinder misfires, overheating | Carburetor service ($200 to $300) or replacement ($500 to $800) |
1. Dirty Fuel Injectors
This is one of the most common issues for why a car jerks when accelerating. Fuel injectors are supposed to provide a steady stream of fuel into your cylinders. A dirty fuel injector would be unable to do this, and your engine won’t get enough fuel to burn.
As a result, your engine won’t work properly and your car will jerk under acceleration. It can also often misfire as you try to accelerate. A dirty fuel injector won’t need to be replaced and you can simply clean them instead. Most repair shops will charge you between $50 – $100 to clean it, and it should take no more than a couple of hours.
You can also clean your fuel injectors yourself to save money, the most basic cleaning method simply requires you to add a cleaning fluid to a nearly empty fuel tank. Other methods will require tools and basic mechanical knowledge to do it.
Symptoms
The symptoms of dirty fuel injectors might include the car jerking or shuddering under acceleration, increased fuel consumption, loss of power, and engine misfires. It can also cause the car to have difficulties starting or rough idling.
Diagnosis and Troubleshooting Steps
To diagnose dirty fuel injectors, you can use an OBD II scanner to look for any error codes related to fuel injection. Another method is to physically inspect the injectors for any build-up of dirt or grime. This requires some mechanical skills and careful handling to avoid damaging the injectors.
How to Repair or Replace the Faulty Parts DIY
You can clean fuel injectors at home using a fuel injector cleaning kit, which typically costs around $15-$30. In order to do this, you need to disconnect the fuel pump, connect the cleaning kit, and run the engine to allow the cleaning agent to pass through the injectors. Please note that this task requires some basic mechanical knowledge.
Repair/Replacement Costs at a Workshop
Cleaning fuel injectors at a repair shop will usually cost between $50 – $100 and should take no more than a couple of hours. The cost mainly covers the labor as the cleaning fluid is relatively inexpensive.
2. Bad Fuel Pump Or Fuel Filter
Fuel supply issues are often the cause of a car jerking when accelerating. Other than dirty fuel injectors, your car might have a bad fuel pump or fuel filter. A bad fuel pump won’t be able to pump the correct amount of fuel into the engine. While a dirty fuel filter will clog the system, again causing the incorrect amount of fuel to be fed into your engine.
Fuel pumps vary from one car to another, and replacement costs will vary depending on your car’s make and model. The average cost for a fuel pump replacement is around $450 but can vary between $250 – $1000. You will need to visit a repair shop for a more accurate estimate. Meanwhile, a fuel filter typically costs no more than $165 to replace, including labor.
Symptoms
Symptoms of a bad fuel pump or fuel filter might include the car jerking when accelerating, a loss in power, and the engine sputtering or stalling at high speeds. The car might also have difficulties starting, and you might hear a high-pitched sound when the vehicle is running.
Diagnosis and Troubleshooting Steps
A professional mechanic typically uses a fuel pressure gauge to check whether the fuel pump is generating the correct pressure. Additionally, they might visually inspect the fuel filter to determine if it is clogged or dirty. An OBD II scanner can provide error codes related to the fuel system.
How to Repair or Replace the Faulty Parts DIY
You can replace a fuel pump or fuel filter at home, but it requires a certain level of mechanical knowledge. The cost of a fuel pump or filter will depend on the make and model of your car. Always remember to relieve the fuel system pressure before starting the task to avoid accidents.
Repair/Replacement Costs at a Workshop
At a repair shop, replacing a fuel pump can cost between $250 – $1000, while a fuel filter replacement typically costs no more than $165, including labor.
3. Damaged Fuel Lines
Most cars will have a metal line that runs underneath the car that connects the fuel tank to the engine. If you have a damaged fuel line, then it might lose pressure. This in turn causes a loss of pressure in the fuel line and your car can feed the appropriate amount of fuel into your engine.
If there’s damage or a leak on your fuel line, then you will need to replace it. A simple replacement job should cost no more than $120. However, if your car requires your mechanic to drop the car’s fuel tank to replace the line, then it could cost you upwards of $500 as more effort is needed to replace the fuel line.
Look out for a puddle of fluid underneath your car when parked to see if you have a fuel leak (as indicated by a P0441 error code).
Symptoms
Symptoms of damaged fuel lines can include the car jerking or stalling when accelerating, fuel odors, or visible fuel leaks under the car.
Diagnosis and Troubleshooting Steps
Diagnosing damaged fuel lines involves visually inspecting them for any visible signs of wear, damage, or leaks. An OBD II scanner can also provide error codes related to the fuel system.
How to Repair or Replace the Faulty Parts DIY
Mechanical knowledge is required to replace a fuel line, and it is a complex task that you should only attempt if you are comfortable working on cars. The task involves lifting the car, locating the damaged line, disconnecting it, and installing a new one.
Repair/Replacement Costs at a Workshop
A repair shop should charge no more than $120 for a straightforward fuel line replacement. However, if the line requires accessing by dropping the fuel tank, the increased labor involved could raise the cost to $500.
4. Faulty Spark Plugs
Your engine’s spark plugs are responsible for igniting the fuel and air mixture inside your engine’s cylinders. This starts the combustion process and powers your car. When a spark plug goes bad, it won’t be able to ignite properly as the spark will be too weak or it might not even spark at all.
As a result, your engine won’t run smoothly and cause engine misfires. Most spark plugs will need to be changed between 20,000 – 30,000 miles. They’re usually part of routine service and are changed regularly by your mechanic. So if you maintain your car properly, it shouldn’t be a problem.
If your spark plugs go bad prematurely, then you might want to give your engine a full check as something else might be causing it. In any case, bad spark plugs will need to be replaced.
The total cost is usually around $20 – $150, but you can replace them yourselves as they’re quite simple and there are lots of video tutorials online. The spark plugs themselves usually cost no more than $20 each to buy. You can save a bit of money by doing it yourself.
Symptoms
Symptoms of faulty spark plugs include the car jerking or misfiring when accelerating, decreased fuel economy, and difficulties when starting the car. You might also notice a lack of acceleration or the engine making a rattling, pinging, or “knocking” noise.
Diagnosis and Troubleshooting Steps
Faulty spark plugs can often be diagnosed using an OBD II scanner to find any related error codes. Visual inspection of the spark plugs can also reveal issues like deposits, cracks, or wear that could lead to poor performance.
How to Repair or Replace the Faulty Parts DIY
Replacing spark plugs is a simple DIY task that requires a spark plug socket and a ratchet. It involves removing the spark plug wire, removing the old spark plug, checking the new spark plug gap, and installing the new spark plug.
Repair/Replacement Costs at a Workshop
At a workshop, replacing spark plugs usually costs around $20 – $150. The cost depends on the number of spark plugs your car has, the type of spark plugs required, and the labor charges of the workshop.
5. Moisture In Distributor Cap
Much like the spark plug, the distributor is an essential part of your car’s ignition system. If your car has a distributor-type ignition coil, then moisture can build up inside its cap, causing the ignition coil to be unable to send high-voltage electricity to your spark plugs correctly.
This often happens when you live in a snowy area or during the winter and you’ve parked your car outside for too long, causing moisture to build up.
Most modern cars will have a coil-on-plug system, meaning the ignition coil sits directly on top of the spark plugs. In this case, you can rule out this possibility as the coil-on-plug system doesn’t have a distributor cap. If you do have a distributor type, there’s no need to replace it.
The problem will go away once the moisture is gone. You can avoid this problem altogether by simply parking your car in an indoor garage. A thermal cover can also help reduce moisture build-up.
You can learn more about ignition systems in the video below:
Symptoms
Symptoms of moisture in the distributor cap might include the car jerking or misfiring when accelerating, difficulties starting the car, and the engine stalling or running rough.
Diagnosis and Troubleshooting Steps
Visually inspect the inside of the distributor cap for any signs of moisture or corrosion to diagnose moisture. If you find any, dry out the moisture and clean the cap with a clean, dry cloth.
How to Repair or Replace the Faulty Parts DIY
If your car has a distributor-type ignition system, you can clean and dry the cap yourself. It involves removing the cap, drying it out using a clean cloth or a hairdryer, cleaning the cap and rotor contacts, and reinstalling the cap.
Repair/Replacement Costs at a Workshop
Since moisture in the distributor cap can usually be resolved without replacing any parts, the cost at a workshop would mainly be for the labor, which could range from $50 – $100.
6. Blocked Air Intake Or Faulty Mass Airflow Sensor
Your car takes in the air outside using an air intake, which it then uses to mix with fuel and ignite using spark plugs. A blocked air intake or faulty air sensor will make the car unable to suck in the air it needs. As a result, the combustion process won’t run smoothly, causing your car to jerk as you try to accelerate it.
The repair cost will vary for a blocked air intake depending on the severity of the problem. For example, if it’s caused by just a dirty air filter, then replacing it should cost around $80 – $150.
However, if an entire replacement of the intake system is needed then it would cost $500 on average. Keep in mind that this would depend on your make and model, and some cars can cost upwards of $1000.
Meanwhile, a faulty mass airflow sensor can cost anywhere between $250 – $400 to replace. The mass air flow sensor helps your Engine Control Unit (ECU) in balancing the fuel amount it feeds into the engine. A faulty mass air flow sensor will cause the incorrect amount of fuel to be fed into your engine.
Symptoms
Symptoms of a blocked air intake or faulty mass airflow sensor can include the car jerking or losing power when accelerating, a decrease in fuel economy, and the engine stalling or running rough.
Diagnosis and Troubleshooting Steps
A blocked air intake can often be diagnosed by visually inspecting the air filter for dirt and debris. For diagnosing a faulty mass airflow sensor, an OBD II scanner can be used to find any related error codes.
How to Repair or Replace the Faulty Parts DIY
Replacing an air filter is a simple task that involves opening the air filter housing, removing the old filter, and inserting a new one. For a faulty mass airflow sensor, it involves disconnecting the sensor, removing it, and installing a new one.
Repair/Replacement Costs at a Workshop
At a workshop, replacing a dirty air filter can cost between $80 – $150. If the entire intake system needs to be replaced, it could cost around $500 on average. Meanwhile, replacing a faulty mass airflow sensor could cost between $250 – $400.
7. Worn-Out Accelerator Cable
A worn-out accelerator cable can cause your car to experience acceleration problems. This cable sits between your gas pedal and the throttle plate in your engine. When you press the pedal, it will open up the throttle plate and allows more fuel to be fed in, making you go faster.
The cable can wear out over time and disrupt the accelerating process. It’s also possible that there’s slack on your accelerator cable, causing the throttle to work improperly.
You should check the cable immediately and replace it if necessary. If the cable breaks then your car will cease to work completely. Most accelerator cables will cost you no more than $150 to replace including labor costs. Keep in mind that with some cars the cost may go upwards of $350.
Symptoms
Symptoms of a worn-out accelerator cable might include the car jerking or losing power when accelerating, difficulties or delays in acceleration, and a loose or unresponsive gas pedal.
Diagnosis and Troubleshooting Steps
Diagnosing a worn-out accelerator cable involves inspecting the cable for any signs of wear, fraying, or damage. If there’s slack in the cable, adjusting it could solve the problem. If it’s worn or damaged, it will need to be replaced.
How to Repair or Replace the Faulty Parts DIY
Replacing an accelerator cable involves disconnecting the old cable from the gas pedal and throttle body, removing the old cable, routing the new cable in the same manner as the old one, and connecting it to the gas pedal and throttle body.
Repair/Replacement Costs at a Workshop
At a workshop, replacing an accelerator cable usually costs around $150, although, with some cars, the cost may go upwards of $350.
8. Clogged Catalytic Converter
The catalytic converter is part of the exhaust system and it’s responsible for reducing the emission that your car produces. Most catalytic converters will last for 10 years before it needs to be replaced. However, your car’s mileage and engine tune may affect this.
Also, if your catalytic converter fails prematurely, it’s often caused by a more serious issue in your car. Possible causes include faulty fuel injectors, an ignition coil, and a blown head gasket. You should watch out for colored smoke coming out of your exhaust, which indicates a serious issue with your car and may cause damage to your catalytic converter.
If the catalytic converter is clogged or damaged, it allows exhaust gas to build up in your car, causing the car to jerk when accelerating. Your car might even stall as you try to accelerate.
A catalytic converter replacement cost is anywhere between $900 – $2500 depending on your car’s make and model (you can learn more in our guide on the Crown Vic catalytic converter and the 2005 Ford Five Hundred catalytic converter or the 2003 Lincoln Town Car catalytic converter).
Symptoms
Symptoms of a clogged catalytic converter can include the car jerking or losing power when accelerating, a decrease in fuel economy, difficulties or delays in acceleration, and a sulfur or rotten egg smell from the exhaust.
Diagnosis and Troubleshooting Steps
Diagnosing a clogged catalytic converter can often be done using an OBD II scanner to find any related error codes. Other diagnostic methods could include a back-pressure test or visual inspection.
How to Repair or Replace the Faulty Parts DIY
Replacing a catalytic converter is a complex task that involves lifting the car, removing the old converter, and installing the new one. It’s usually recommended to have this done by a professional due to the complexity and safety requirements.
Repair/Replacement Costs at a Workshop
At a workshop, replacing a catalytic converter usually costs anywhere between $900 – $2500, depending on your car’s make and model.
9. Bad Transmission Control Module
When a car jerks when accelerating, it can also be caused by a transmission problem. A common cause would be the transmission control module, often called the solenoid.
This module is responsible for gear changes as you drive along. If you have a bad control module, you’ll notice your car will have a bit of lag as it tries to change gears. In severe cases, the car will jerk violently when changing gears.
As with most car parts, the replacement cost for a transmission control module varies between cars. You can expect to pay between $500 – $900 when replacing the control module.
Symptoms
Symptoms of a bad transmission control module can include the car jerking or losing power when accelerating, difficulties or delays in gear changes, and the transmission getting stuck in a particular gear.
Diagnosis and Troubleshooting Steps
A bad transmission control module can often be diagnosed using an OBD II scanner to find any related error codes. Other diagnostic methods could include inspecting the module for any signs of damage or checking the module’s connections.
How to Repair or Replace the Faulty Parts DIY
Replacing a transmission control module is a complex task that involves disconnecting the battery, locating the module, disconnecting it, removing it, and installing the new one. It’s usually recommended to have this done by a professional due to the complexity and potential for damage if done incorrectly.
Repair/Replacement Costs at a Workshop
At a workshop, replacing a transmission control module usually costs between $500 – $900.
10. Defective Carburetors
The carburetor is responsible for controlling how much fuel and air are being mixed before it is fed into the engine.
If the carburetor is damaged, then it won’t be able to do this properly, and this will lead to your car misfiring and jerking under acceleration. If your car was made after 1995, you can gloss over this. Carburetors have fallen out of popularity since the ’90s when fuel injectors are far more reliable.
However, if you have an older car with carburetors, then a car jerking during acceleration can be caused by a bad carburetor (which you can somewhat mitigate by learning how to tune a carburetor).
Sometimes all your car needs is a good service, which will typically cost between $200 – $300. But if your carburetor has gone bad and needs to be replaced, then you should expect to pay between $500 – $800.
Most of the issues mentioned above will cause your check engine light to come on. If it does, we advise that you take your car to a repair shop and fix the problem. If your check engine light is flashing, then you should stop driving immediately as it indicates that there is a serious issue with your car.
Symptoms
Symptoms of a defective carburetor can include the car jerking or losing power when accelerating, a decrease in fuel economy, the engine running rough or stalling, and difficulties or delays in acceleration.
Diagnosis and Troubleshooting Steps
Diagnosing a defective carburetor involves inspecting it for any signs of damage, leaks, or clogs. If the carburetor is simply dirty, cleaning it could solve the problem. If it’s damaged, it will need to be replaced.
How to Repair or Replace the Faulty Parts DIY
Cleaning a carburetor involves removing it from the engine, disassembling it, cleaning all the parts with a carburetor cleaner, and then reassembling and reinstalling it. Replacing a carburetor involves removing the old one and installing a new one.
Repair/Replacement Costs at a Workshop
At a workshop, servicing a carburetor usually costs between $200 – $300. If the carburetor needs to be replaced, it can cost between $500 – $800.
Remember, if your check engine light is on or flashing, it’s always best to have your car inspected by a professional to prevent further damage.
Car Jerks When Accelerating At Different Speeds
As you can see from the list above, several potential issues can cause your car to jerk when accelerating. You can narrow down the possible causes of your car jerking by paying attention to at what speed your car jerk.
Different issues can cause your car to jerk at different speeds. Meaning if your car jerks at slow speeds, the problem that causes it can be different from when a car jerks at high speeds. Here, we’ll be looking at alternative and more acute scenarios, ranging from why a car’s jerking at different speeds. Or, entirely different (but still relevant or similar) issues…
Car Jerks When Accelerating At Low Speeds
When a car jerks at slow speeds, there are a variety of problems that could cause it. However, it’s often attributed to faulty spark plugs, which aren’t too complicated to deal with.
A replacement job or a quick tune-up (to find out more, check out our overview of what is a tune-up and what does a tune-up consist of) should resolve the issue quickly, and they aren’t expensive to do.
Keep in mind that it can also be caused by air intake, catalytic converter, or fuel injector and carburetor problems if you’re in an older car. If changing or servicing the spark plugs doesn’t help, then you will need to check the other parts.
Car Jerks When Accelerating At High Speeds
Airflow issues are often the cause when a car jerks when accelerating at high speeds. Your car needs more air to take into the engine at high speeds. If there’s an issue with your intake system, then your car will struggle to feed the engine with the correct amount of air.
As a result, the combustion process will be disrupted and your engine can’t run properly. Which causes misfires and your car to jerk as it tries to accelerate. You should have your air intake system and mass air flow sensor checked if you experience this and have it replaced if necessary. But other problems may be causing this as well.
In any case, it would be best to check your car immediately if you’re experiencing this. A car that jerks during acceleration at high speeds can be dangerous to drive, as you might lose control of your car’s speed. Your car might lose its speed rapidly and you could be rear-ended by drivers behind you if they’re not aware.
Car Jerks While Driving At Constant Speed
If you’re trying to accelerate from a full stop or while moving at a constant speed and your car jerks, your car is telling you that it’s not getting the fuel it needs to accelerate smoothly.
This is often caused by dirty fuel injectors or fuel pump issues, where the fuel system isn’t able to provide a steady stream of fuel into your engine. This can be stressful as it means your car will struggle to pull away even in the most common driving conditions such as pulling out of a parking space.
Car Jerks When Accelerating In First Gear
But… What if you’re noticing that your car is jerking when accelerating, specifically while you’re in first gear? In other words, this occurs while you’re accelerating from a dead stop. The underlying cause may differ depending on whether you have an automatic or manual transmission.
If it’s an automatic transmission, the most common cause of this issue is a bad transmission control module (TCM). As the primary computer that determines the most ideal shift time, a malfunctioning TCM will cause the gearbox to shift slowly (i.e. delayed response) or deliver harsh and rough gear changes.
Although, the underlying issue might be different if you’re driving a manual. In this instance, the most possible cause (if the issue is gone once you shift into second gear) is a worn-out clutch. Or, it might also be a bad pressure plate. It might also be due to a rear main seal leak, which is leaking oil onto the clutch.
Car Jumps When Accelerating
Experiencing a car jump when accelerating is typically indicative of a problem within the vehicle’s fuel supply system. Issues with the fuel pump, fuel filter, or fuel injectors may prevent the engine from receiving the adequate amount of fuel it requires to function optimally.
This lack of fuel can result in intermittent and abrupt power delivery, leading to the feeling of the car “jumping” forward. To rectify this, it may be necessary to replace or clean the fuel pump, filter, or injectors, depending on the specific issue. Regular maintenance and inspection of these components can help prevent this problem in the future.
Car Jerks When Accelerating No Check Engine Light
Experiencing a scenario where the car jerks when accelerating with no check engine light is indeed perplexing. This issue often originates from a dirty or clogged air filter. Air filters play a crucial role in your car’s performance by ensuring only clean and pure air enters the engine for combustion.
When these filters are clogged, the air supply is restricted, causing the engine to work harder and resulting in a jerking sensation when accelerating. It’s vital to replace or clean air filters regularly, helping your engine perform better and reducing the chances of such occurrences.
Car Jerks When Accelerating Check Engine Light
If you find that your car jerks when accelerating with a check engine light, it’s usually a symptom of an underlying issue within the engine management or emission control system. This could be due to malfunctioning oxygen sensors, mass airflow sensors, or problems with the catalytic converter, all of which could trigger the check engine light.
These issues require immediate attention and diagnostics from a professional. Post-diagnostics, any necessary repairs or component replacements should be carried out to restore the car to its optimum performance.
Car Hesitates and Jerks When Accelerating
A situation where a car hesitates and jerks when accelerating often points toward problems within the ignition system. Issues with the spark plugs, ignition wires, or the ignition coil can result in a weak spark.
This weak spark can then cause the engine to misfire, leading to hesitation and jerking during acceleration. Routine maintenance involving the inspection and potential replacement of these ignition system components can help address this issue and restore smooth acceleration.
Car Stutters When Accelerating
When the car stutters when accelerating, it’s often a sign of a malfunctioning transmission system. Problems with the automatic transmission, like worn-out gears or low transmission fluid, can cause your car to stutter during acceleration.
Regular maintenance, including transmission fluid checks and gear inspections, is essential to keep the transmission system functioning well. In some cases, significant repairs or component replacements may be necessary to solve the stuttering problem.
Car Feels Like It’s Pulling Back When Driving
When your car feels like it’s pulling back when driving, it’s typically indicative of issues within the brake system. Sticky brake calipers or worn-out brake pads might be causing excessive friction, even when you’re not actively braking.
This could create a sensation of your car pulling back as you drive. Regularly inspecting and servicing your brake system, including replacing worn pads and ensuring the calipers move freely, can help alleviate this issue.
Car Jerks When Releasing Accelerator
The issue of your car jerking when releasing the accelerator can be tied to a problem with the throttle position sensor. This sensor’s purpose is to relay the position of the throttle to the engine control unit, which then regulates fuel injection and ignition timing.
If this sensor malfunctions, it can cause the engine to behave erratically when you lift off the accelerator, resulting in a jerking sensation. Consulting a mechanic to diagnose and replace the faulty sensor can rectify this problem.
Car Not Accelerating and Jerking
If you’re experiencing a situation where your car not accelerating and jerking, it might be due to a blocked exhaust. Over time, carbon deposits can build up in the exhaust system, creating an obstruction that affects engine performance.
This blockage can cause your car to jerk and prevent it from accelerating smoothly. Regular servicing of your car, including periodic cleaning of the exhaust system, can address this issue. To learn more, check out our guide on where is the catalytic converter located.
Car Jerks When Accelerating Uphill
A car jerks when accelerating uphill is often due to fuel or ignition system problems that are exacerbated by the additional strain of climbing a grade. The engine demands more fuel when working harder (like driving uphill), and any issues with fuel delivery or spark generation can cause noticeable jerking.
Regular maintenance of your car’s fuel and ignition systems, and potential component replacements, can help keep your car running smoothly in all conditions.
Car Jerks When Driving On Highway
If your car jerks when driving on the highway, it could indicate problems with the vehicle’s fuel system, transmission, or ignition system. Driving at higher speeds puts more demand on these systems.
Any weaknesses or faults can cause the car to jerk. Regular servicing and maintenance can identify and rectify these faults, providing a smoother and more comfortable driving experience.
Car Studders When Accelerating
When your car studders when accelerating, it’s a common symptom of an issue with the vehicle’s ignition or fuel system. Faulty spark plugs, dirty fuel injectors, or a clogged fuel filter can cause the car to “shudder” or hesitate. These components should be checked and replaced or cleaned as needed.
Car Skipping When Accelerating
If your car skips when accelerating, it could be due to problems with the drive train. Damaged CV joints, worn drive belts, or issues with the differential can lead to a “skipping” sensation when you try to accelerate. Inspections and necessary repairs or replacements can help to fix these issues.
Car Jerks When Accelerating at Low Speeds Automatic
The issue of the car jerking when accelerating at low speeds automatic can be linked to a malfunctioning transmission control module. This module manages the gear shifts in an automatic car.
If it’s faulty, the vehicle may jerk during low-speed acceleration due to improper gear shifting. A professional mechanic can diagnose and potentially replace this module to resolve the problem.
Automatic Transmission Car Jerks When Accelerating
As we’ve said, if you drive a manual then the acceleration jerks might be caused by improper gear change. If you have an automatic, your car may jerk because of transmission problems but it’s not as common. Fuel and air supply issues are the most common causes of a car that jerks when accelerating.
The next common issue is with the ignition system, where your engine isn’t igniting the fuel and air mixture properly. Both problems affect the combustion process and often cause misfires that result in the car jerking as it accelerates.
Compared to engine problems, a transmission jerk is usually more distinct. Your car usually jerks as it tries to change gear, or it would hesitate or take longer to change gear. If you experience this, then the most common problem will be with its solenoid.
If you believe that you’re experiencing transmission issues, it would be best to visit a repair shop and diagnose the problem. A bad transmission is very dangerous to drive with and it can fail at any time. You can learn more about transmission symptoms in the video below:
The cost of a transmission repair job will vary from one car to another (and once you’ve found a transmission repair in Omaha). However, severe damage to the transmission is quite costly to fix. You’d typically need upwards of $4,500 to rebuild or replace a transmission.
Can I Drive A Car That Jerks When Accelerating
You can, but we would advise against it. Depending on the severity of the issue, you might still be able to drive the car with minimum interruptions. However, it would be wise to diagnose the problem and fix it right away.
As we’ve said, the problem may affect your control of the car and put you in danger. Most of the issues that cause this will turn on the check engine light anyway, which means you really should fix your car.
Common Reasons for Jerky Acceleration: Facts
- You shouldn’t ignore jerky acceleration, as it is a sign of a problem.
- Dirty fuel injectors are a common cause of jerky acceleration and lead to engine misfires. This affects power loss during acceleration and at a consistent speed.
- A blockage that interrupts the fuel-air mixture may prevent the car from accelerating as expected.
- Worn-out spark plugs may be unable to ignite fuel in the piston quickly enough, causing a delay in acceleration.
- Dirty air filters may cause pollutants to build up and prevent proper acceleration. Cleaning or replacing air filters can solve the issue.
- Damaged cylinders can lead to an engine misfire and affect the engine’s ability to work properly.
- Blocked catalytic converters can lead to a too-rich air-fuel mixture and cause the car to jerk when accelerating. A catalytic converter cleaner can help fix this.
- Damaged gas lines can cause a loss of pressure, leading to a jerky forward motion, and may even cause engine fires in extreme cases. Check for holes in the fuel line.
- Damaged acceleration cables may cause jerky acceleration, as it links the gas cable and the engine throttle plate, allowing the car to accelerate.
- Defective carburetors can cause not only jerky acceleration but also poor performance in general. The carburetor mixes fuel and air before it enters the engine.
- Moisture accumulating on the distributor cap during snowy weather can cause jerky acceleration. Parking the car in a warmer spot can help avoid this issue.
Conclusion
A car jerking during acceleration can be an uneasy and worrying feeling. The good news is that you can easily avoid this by following the required service routine. And, maintaining your car properly.
Most of the parts that cause misfires are often serviced or replaced during maintenance. Therefore, proper maintenance can help you to avoid acceleration jerking problems.
That being said, jerking under acceleration can be caused by more serious issues such as transmission and catalytic converter problems. Whether it’s because the parts are nearing their lifespan or something else is causing premature damage… We strongly advise you to fix these issues as they are very serious.
If the repair costs are too expensive, then another option is to sell or scrap your car. If you wish to proceed with the repairs, find out if other problems caused the parts to fail prematurely. Leaving it unfixed will keep causing damage to other components in your car.
Whatever the cause is, be sure to follow your car’s service schedule and repair the problems as necessary. A car that runs smoothly is not only more comfortable to drive, but also safer.
FAQs On Car Jerks When Accelerating
If your car jerks when accelerating and you’re still puzzled, our FAQs here might help…
Why Does My Car Jerk When I Accelerate
There are several reasons why your car jerks when accelerating. The most common of which can be attributed to fuel not being able to flow into the combustion chamber. Thus, it won’t let the engine ignite and run properly. This includes dirty fuel injectors, bad fuel pumps, clogged fuel filters, or damaged fuel lines. All of which can prevent fuel from circulating to the engine. Besides that, it could also be a failure of your engine to ignite the combustion mixture correctly. We can blame bad spark plugs, and moisture in your distributor caps. Or, there might be something amiss in the ignition and throttle system. A blocked air intake or faulty MAF sensor would also cause your car to jerk while it’s accelerating. Elsewhere, we might also blame the catalytic converter or even the transmission.
Why Is My Car Jerking When I Give It Gas
In addition to jerking under acceleration, your car might also exhibit issues where it’s jerking and shaking as you’re giving it the gas from a full stop. This would include a jerky sensation anytime you’re maneuvering at low speeds like trying to park. Or, are pulling away from a junction. Usually, situations like these mean that your engine isn’t able to get enough fuel. Most of the time, dirty fuel injectors may clog the flow of fuel into the engine. Otherwise, a bad fuel pump or clogged fuel filter may also prevent fuel from being able to flow freely into the engine. While you’re there, it’s also worth checking the fuel lines to ensure that there aren’t any obstructions.
What Does It Mean When Your Car Jerks While Driving
One of the easiest ways to tell if your car is jerking while driving is to pay attention to the tachometer. Press your foot against the gas pedal, and observe how the rev counter’s needle moves. If your car is working fine, that needle should smoothly and gradually climb its way up the RPMs. However, if you notice the needle pausing and stop climbing for a second or two. Then, it’s a sign that your car is jerking while driving. Another way to notice if your car is jerking while driving is to pay close attention to how your car feels. Acceleration should mostly feel progressive and smooth. If you notice any hesitation from the car to move… Even after you’ve stomped on the gas pedal… That’s another tell-tale sign that your car is jerking while driving.
Why Does My Car Jerk When I Brake
When you’re braking, your car should scrub off speed and slow down to a halt gradually and smoothly. In other words, it shouldn’t jerk, shake, or vibrate noticeably. If you can feel this happening, the most common underlying issue would be something going wrong with your brakes. Typically, this would mean that you’re most likely braking atop a set of worn-out brake pads or brake rotors. Both of which need to be replaced urgently. In addition, there could also be something wrong with your brake fluid. For instance, a lack of fluids in the reservoir. Or, the presence of air bubbles inside the brake fluid. Faults with the ABS (anti-lock brakes) could also cause your car to jerk under braking. As is other random problems cropping up elsewhere in the braking system.
Why Does My RPM Go Up And Down While Parked
When your car is parked up and is basically left idling, the RPM should remain steady. Anytime you’re noticing the RPM needle bouncing up and down, there’s usually something wrong with the engine. The most common point of failure is the presence of vacuum leaks. Alternatively, perhaps your engine’s idle air control (IAC) valve isn’t functioning right. Otherwise, we can look at problems with the EGR (exhaust gas recirculation) system. Or, bad O2 (oxygen) sensors, and faulty throttle position sensors. Or, a worn-out MAF (mass air flow) sensor. Aside from that, we may also blame the spark plugs or fuel injectors. Or, a fuel pump that is causing your engine’s idle to fluctuate.
Why Is My Car Bucking When I Accelerate
Car bucking during acceleration often indicates a problem with the fuel, air, or ignition system. It can be due to issues like a clogged fuel injector, a dirty air filter, or a malfunctioning mass airflow sensor. These problems disrupt the air-fuel mixture, leading to poor combustion, which results in the bucking sensation. Also, spark plug issues or a failing transmission can cause the car to buck. It’s best to get your car inspected by a professional mechanic to identify the exact issue.
Why Won’t My Car Accelerate
There could be several reasons why your car isn’t accelerating. The most common issues are related to the fuel system, such as a dirty fuel filter. Or, a failing fuel pump, or bad injectors. Other problems could include a faulty throttle position sensor, a clogged catalytic converter, or transmission issues. An issue with the ignition system like worn-out spark plugs can also prevent acceleration. Always get a professional diagnostic to identify the root cause.
How to Fix Car Acceleration Problems
Fixing car acceleration problems starts with diagnosing the cause. This could involve checking the fuel system, air intake, or ignition system. Replacing a clogged air or fuel filter, cleaning or replacing faulty fuel injectors. Or, swapping out old spark plugs can often solve the issue. If the problem lies with the transmission, you may need professional help. Regular vehicle maintenance and prompt addressing of any engine warning signs can prevent acceleration issues.
Why Does My Car Accelerate Slowly When I Press the Gas
If your car is slow to accelerate when you press the gas, it could indicate an issue with the transmission, fuel system, or exhaust. Transmission issues, like slipping gears or a failing clutch, can delay power transmission. Inadequate fuel due to a clogged fuel filter or failing fuel pump can cause sluggish acceleration. A blocked exhaust or catalytic converter can also lead to slow acceleration. A mechanic can help diagnose and repair the issue.
Which Is Not a Step to Perform If Your Gas Pedal Gets Stuck
If your gas pedal gets stuck, do not turn off the engine immediately. This can cause the steering wheel to lock, making it hard to control the car. Instead, shift into neutral, use the brakes to slow down, and then safely pull over. Once stopped, you can turn off the engine and call for help. Regular pedal and floor mat maintenance can prevent such situations.
Can Low Oil Cause Misfire
Yes, low oil can cause a misfire. Oil provides lubrication and cooling to various engine parts. When oil levels are low, it can lead to overheating, causing components to wear down and function poorly. This could lead to the engine misfiring. Regular oil changes and maintaining the correct oil level can prevent such issues.
Should RPM Be at 0 When Parked
No, the RPM should not be at 0 when parked. If your car is running, the RPM gauge should show the engine’s idle speed. This is typically between 600 and 1000 RPM. If the RPM falls to 0, it indicates that your engine has stalled. This could be due to a variety of issues, from a weak battery to a faulty ignition system.
Does Needing an Oil Change Affect Acceleration
Yes, needing an oil change can affect acceleration. Old, dirty oil can cause friction among engine parts, reducing engine performance and efficiency. This can make your car slower to accelerate. Regular oil changes ensure your engine remains lubricated, reducing friction and maintaining optimal performance.
Can a Bad Serpentine Belt Cause Rough Idle
A worn-out or loose serpentine belt can indeed cause a rough idle. The serpentine belt drives multiple engine accessories like the alternator, power steering pump, and air conditioning compressor. If it’s not functioning properly, it can cause these components to work ineffectively. Thus, leading to engine vibration or a rough idle.
Why Is My Car Loud When I Accelerate
A loud noise during acceleration could indicate an exhaust system issue. For example, a hole in the muffler or exhaust pipe. It could also be due to a worn or loose fan belt, transmission issues, or a failing catalytic converter. These issues can lead to increased engine noise during acceleration. A mechanic can identify the source of the noise and provide a solution.
Why Does My Car Sound Like Something Is Dragging When I Accelerate
If your car sounds like something is dragging during acceleration, it might indicate an issue with the exhaust system or a loose undercarriage part. Broken or loose exhaust components can drag on the road and make noise. Other issues could include a loose heat shield, damaged suspension components, or low-hanging bumper parts. An inspection by a professional mechanic can pinpoint the problem.
Can Bad Spark Plugs Cause a Car to Shut Off While Driving
Yes, bad spark plugs can cause a car to shut off while driving. Spark plugs are essential for igniting the fuel-air mixture in the engine. If they’re faulty, it can lead to irregular or incomplete combustion, causing the engine to stall or shut off. Replacing worn-out spark plugs can help prevent this.
How to Fix Your Engine Hesitation During Acceleration
Engine hesitation during acceleration can be caused by several issues. That includes dirty or faulty fuel injectors, clogged air filters, or fuel filters. Or, ignition system issues like faulty spark plugs or ignition coils. Identifying and fixing the cause is the key. This might involve cleaning or replacing the fuel injectors, or replacing the air or fuel filter. Or, addressing the ignition system issues.
Why Does My Oil Pressure Go Up When I Accelerate
Oil pressure increases with acceleration because the engine works harder and faster, demanding more oil for lubrication. However, if the oil pressure rises excessively, it could point to issues like a clogged oil passage. Or, a failing oil pump, or a faulty oil pressure gauge. Regular oil changes and maintaining the right oil level can help keep the oil pressure in check.
How Do You Fix a Car Jerking When Accelerating
To fix a car that jerks when accelerating, you need to identify the root cause. This could be an issue with the fuel system. For instance, a clogged fuel filter, or a failing fuel pump. Or, a problem with the ignition system, such as bad spark plugs or ignition coils. It might also be due to a malfunctioning transmission. Depending on the cause, fixing the issue might involve replacing the problematic part. Or, cleaning the fuel injectors or air filter.
What Is the Most Common Cause of a Stuck Accelerator
The most common cause of a stuck accelerator is a malfunctioning throttle body or a faulty throttle position sensor. Other issues can include a jammed or frayed throttle cable, or a floor mat interfering with the pedal. Regular maintenance, including checking the floor mats, throttle body, and throttle cable, can help prevent a stuck accelerator.
