Drop Tine

Ok I need help big time I know I have posted threads already on my truck missfiring but idk what to do anymore its still missing. I've done all new coil packs, plugs, cats, o2 sensor, maf sensor, new pcm, cleaned throttle body and everything else I could think of to take care of the missfiring. Does anyone know what it could be or any suggestions I would greatly appreciate it

symon_say

Injectors??

Drop Tine

Had them cleaned out

backinblack04

X2 also do you know what cylinder is missing?

Drop Tine

Right now its cylinder 8 but its been random most of the time

symon_say

I have the same problem, mine only missfire at low rev sometimes, i have already replace most of those things, only thing i can think of is injectors and cats, those 2 are next on my list.

2thousand5.4

Maybe a vacuum leak or something with the EGR, maybe something with the fuel system? Try cleaning out your fuel rail maybe something is stuck in there. What codes is it throwing

Drop Tine

P0308 and a rough idle and start code I forget it

2thousand5.4

That's a #8 cylinder misfire (like you said). If the problem moves from cylinder to cylinder then I would cheak the vacuum lines. Clean out the fuel rail maybe you got some crap lodged in there. Might as well change your fuel filter while your at it.

Drop Tine

Ok thank you