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05 f150 5.4 misfire

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Old 12-06-2008, 01:33 AM   #1
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Default 05 f150 5.4 misfire

i have an 05 f150 with a 5.4, you can tell a little by idling that its got a miss. when you get up to around 45mph and press hard on the gas it jerks and bogs down and wont go until i let off a little. i done it on the interstate the other day and as soon as it would start jerking and missing a little light on my dash would come on for a second and go off. the light looked kind of like a picture of a motor. do you have any idea what is causing this?????
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Old 12-06-2008, 06:13 AM   #2
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time for a tune up with new coil boots.Have some check the code and replace the coil in that cylinder
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Old 12-06-2008, 11:27 AM   #3
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Go to Auto zone and have them read what codes were stored and let us know. When you have a SES light it stores a code, this info will help diagnose what the problem it.
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Old 12-06-2008, 03:37 PM   #4
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went to auto zone they said there was no code and everything checked out fine.....still got a miss, what now? thought about replacing every coil but thats 400 bucks and not guaranteed to fix it.
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Old 12-06-2008, 03:59 PM   #5
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Quote:
Originally Posted by boxer712 View Post
i done it on the interstate the other day and as soon as it would start jerking and missing a little light on my dash would come on for a second and go off. the light looked kind of like a picture of a motor. do you have any idea what is causing this?????
Sounds like your gonna need to take it to the dealer to have the code read then. If you did have a SES light appear on the dash it should have stored a code. The dealer can check processor 6 for codes, which I'm guessing won't show with a standard code reader. They can also do a power/load balance to try to simulate the problem.

Good luck, I hope you find out the cause.
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Old 12-06-2008, 05:56 PM   #6
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Quote:
Originally Posted by boxer712 View Post
went to auto zone they said there was no code and everything checked out fine.....still got a miss, what now? thought about replacing every coil but thats 400 bucks and not guaranteed to fix it.
that was exactly what happen to my 2005 5.4 when i would push it when i was towing my camper . i just keped going to try and get home and the light stayed on , i brought to the dealer and it was a bad plug and bad injector (#7)
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