Question about 2005 Ford F-150

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My truck bucks at 45-55 mph and more so after it warms up. the check engine light came on with a cylinder 7 mis fire but at garage it reads fine. If It starts doing it i can switch off overdrive and will stop. It does not die though.and runs fine otherwise. Has 179,ooo miles but transmission is fine. Took and had checked out and all fluids and filters changed. It is a 2005 ford f150 with 5.4 triton engine

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I just repaired a 2004 that had cylinder 4 missfire.It had been a long time since he had done a tune up.I changed the spark plugs and it helped for a day or 2 with the same problem you are having.The problem that I found with his truck was a bad ignition coil for that cylinder.I hope this helps you.

Posted on Feb 05, 2010

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