boxer712

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?????

1stblueoval

time for a tune up with new coil boots.Have some check the code and replace the coil in that cylinder

whitecrystal1

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.

boxer712

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.

whitecrystal1

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.

lasoyatang

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)