Hi. I cannot figure out why I keep having misfires on cylinders 5 & 8. Maybe you all have some ideas? I think I’ve done all of the typical fixes: new injectors, coils, plugs, connectors, on and on and on. Pretty much everything and it still keeps showing up.
I only get misfires after car is fully warm. STFT does seem to be jumping up and down sometimes between -10 and 10 on both banks. Smoke tested and repaired all vacuum leaks I know of. Car seems to run perfectly smooth. The next thing I’m going to do is a compression test, which I admittedly, have been avoiding because I’m nervous about what I may find. The only thing I’ve noticed is that sometimes when I go to start the car, the brake pedal is hard to press so I assume there must be a small vacuum leak in the brake booster system somewhere?
Does anyone have any ideas or maybe has had the same experiences? I’m wondering about ECU drivers?
Thank you!
I think that mechanically it’s very strong. But, that still doesn’t tell me what’s wrong. I’m thinking it’s electrical, since nearly all my other issues have been electrical.