Persistent Rattling Noise in Ford Fiesta 1.0 Ecoboost at Idle

QuestionsCategory: Ask An ExpertPersistent Rattling Noise in Ford Fiesta 1.0 Ecoboost at Idle
Aiden Williams asked 6 months ago
Hello, I have a 2015 Ford Fiesta 1.0 Ecoboost that's been making a very noticeable rattling sound, but only when the car is idling. Once I press down on the accelerator, the rattling stops. It's quite loud, more so in person than in a video I've taken. Can anyone offer some advice on what might be causing this and how to fix it? Thank you!
1 Answers
Zack Norman Staff answered 6 months ago
Hi there, Aiden! Your issue with the rattling noise in your 2015 Ford Fiesta at idle could be caused by several factors. Based on your description and the common issues with similar models, here are some potential causes:
  1. Heat Shield Rattle: A common cause of rattling at idle is a loose heat shield. These are often located near the exhaust system and can become rusted or loose over time. You can check this by tapping the heat shields with a rubber mallet when the car is off to see if they rattle.
  2. Faulty Motor Mount: Another potential cause is a failed motor mount. This can create a heavy, hammering noise at idle. Check if your engine is sitting level in the engine bay. An uneven positioning might indicate a bad motor mount.
  3. Fuel Line Clip Issue: Especially in certain Ford models, the clip holding the fuel line can break, causing a rattle. Since you've mentioned the rattle occurs even when the car is in gear at idle, it's worth checking the fuel line near the firewall.
  4. Loose Components: Check for any loose components under the hood, like headlight screws, hood props, under-hood insulation clips, or hard lines around the radiator. These can sometimes cause rattling noises.
  5. Exhaust System Check: Loose parts in the exhaust system, such as hangers, can also be the culprit. It's a good idea to inspect the exhaust system for any loose or damaged parts.
It's advisable to address these issues carefully and consider seeking professional help if you're not comfortable performing these checks yourself. Remember, safety first! Zack - Motor Verso Mechanics Team