Originally Posted by vasillalov
So basically, what you are saying that after eliminating the obvious: spark plugs and coils, it could be a wide variety of things that can cause a misfire: anything from carbon build up, bad fuel injector, fuel pump , etc etc.
...not the moon phase?
What do you suggest for my situation:
* 25K miles on car
* Brand new spark plugs
* Swapping coils does not move the misfires to a different cylinder
* Injectors and HPFP replaced less than 5K miles during recall campaign
I would try fuel injection cleaner. I know many say it does nothing to Di engines, but i can swear it eliminated some of hesitation on hard acceleration. Cheap enough to try.