I have a 2014 Ford F-150 with a 3.5 EcoBoost engine and am currently dealing with a tricky issue. I suspect there's a misfire in cylinder 5, and I believe this is the cylinder located on the passenger side, at the rear-most position of cylinder bank 1. I'm looking to confirm the correct firing order to ensure I am addressing the right cylinder. Could you provide guidance on this?
Hi there, Lily!
So far, I think you're on the right track with your 2014 Ford F-150. The firing order for the 3.5 EcoBoost engine is 1-4-2-5-3-6. In simpler terms, cylinders 1, 2, and 3 are located on the passenger side of the vehicle, with cylinder 1 being at the front. On the driver's side, you'll find cylinders 4, 5, and 6, with cylinder 4 at the front. So, you're correct in your assumption that cylinder 5 is on the driver's side, specifically the second one from the rear of the vehicle.
A misfire in cylinder 5 can be due to various reasons, including spark plug or coil pack issues. Given your description, it's wise to inspect both the spark plug and coil pack for any signs of wear or damage. Also, it's worth noting that modern engines often lack cylinder markings, as manufacturers increasingly expect these tasks to be handled by professional technicians. However, don't let this discourage you from diagnosing and solving the problem.
Remember, when replacing any component, it's usually best to replace both the spark plug and the coil pack simultaneously to avoid recurring issues. And if you're ever in doubt, seeking professional assistance is always a safe bet.
Best of luck with your repair, and please do let me know if you need further info!
Zack - Motor Verso Mechanics Team
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