05 F150 misfire problem
#16
I'm currently dealing with the same problem with my 05 f150.. After 45-50 it chugs down real bad.. Its been getting worse, I have to drive without o/d.. The dam thing has no power band, only between 2 and 3 rpms, over or under is all sputters..
has new
Plugs
injectors
fuel filter
vct things
no catalytic converters
leaning toward camshaft phasers.. thinking one or both banks are stuck, either timing advanced or retarded??
last thing that comes to mind is, the ford tech I talked with said my oil pressure was dropping at random intervals and there is a nasty ticking from the timing region.. It started as the that faint vct cicking and has gotten way worst
has new
Plugs
injectors
fuel filter
vct things
no catalytic converters
leaning toward camshaft phasers.. thinking one or both banks are stuck, either timing advanced or retarded??
last thing that comes to mind is, the ford tech I talked with said my oil pressure was dropping at random intervals and there is a nasty ticking from the timing region.. It started as the that faint vct cicking and has gotten way worst
#17
#18
i had one dead cyl 5 before in mine 4.6 07 turns out the coil shorted out and took the computer with it, it killed the pcm coil driver for the cyl only rest of the computer was fine.
if this is your case, it doesnt matter how many time you switch the coils, the code will always stay on those cyl(s) cause the computer is never sending the signal to return it so there for it thinks its a misfire, if you switch coils, the code will still stay there. i do agree with using motorcraft plugs, and i have been hearing good things on the i believe denso irduim i know i spelled that wrong.
maybe this might help a little, however mine said exctaly which coil was bad. that to lean code is usally caused by a vac leak, but then again it usally effects both sides (banks) of the motor. only other thing would be a o2 sensor, but they rarely if ever go out. i know there supposed to be "checked" like every 100k i believe. whats making this odd to firgure out is only one side of the motor is doing it.
if this is your case, it doesnt matter how many time you switch the coils, the code will always stay on those cyl(s) cause the computer is never sending the signal to return it so there for it thinks its a misfire, if you switch coils, the code will still stay there. i do agree with using motorcraft plugs, and i have been hearing good things on the i believe denso irduim i know i spelled that wrong.
maybe this might help a little, however mine said exctaly which coil was bad. that to lean code is usally caused by a vac leak, but then again it usally effects both sides (banks) of the motor. only other thing would be a o2 sensor, but they rarely if ever go out. i know there supposed to be "checked" like every 100k i believe. whats making this odd to firgure out is only one side of the motor is doing it.
Last edited by st one50; 12-24-2011 at 02:51 AM.
#19
#20