dutch555

bump to see whats wrong my car is having similar issue

evoVI_PR

Any updates or new suggestions? Same issue here!
04' evo8, 126K miles. 880 injectors, walbro pump, Tephra Mod V7, FP green.
Thought it was a boost leak I found. Fixed it and the car seemed fine for about a day and suddenly the miss returned and has gotten worse. This is my daily driver so it drives me crazy. The car does not miss at WOT, although it does seem slower than before all of this started. I'll be checking the plugs, and probably do a compression and leak down test soon.

Any ideas?

Thanks,
JCG

treager

iTrader: (1)

Same prob, full exhaust, ebc profec 2, stock fuel etc. please we need some answers! misfire in 4000 rpm and bad idle, when a/c turned on gets worse, I have a boost guage and boos goes up at IDLE when a/c turned on and rpm goes up and down. really weird, lost big power. when a/c is turned off the only problem is misfire in 2500 to 4000 rpm. but boost is okay.

Any help from the pros would be great thank you!