Hi guys, Sorry im back again. I have a mad misfire, from both sides that is noticeable at idle. I can build maybe 5psi before it chokes and starts stuttering. The level of boost built isnt constant, meaning its not always 5pound (its not safety boost) Ive done multiple power balance tests showing all cylinders are indeed firing, I have re done ignition timing, and im pretty stumped. If all are firing what would be causing constant missing, maybe 2per second each side? Idle is quite solid, just unhealthy with missing. Im about to test s2 PTU for any fault. Posting now to hopefully get some responses before the day is up! thanks in advance, Kyle
PTU is fine, injectors are fine, coilpack connectors + coilpacks are fine. Two coilpacks read about 0.9 ohm, which is 0.2 over FSM. Would this cause an issue? The coilpacks are the same as the ones I had when the car was fine.
https://www.youtube.com/watch?v=IyZZfkMuLmI&feature=mh_lolz&list=HL1311130913 This is what my exhaust sounds like. Building a max of 5psi before massive hesitation(feels like) and no more power. Could deleting the factory boost solenoids have affected anything?
Check your fuel filter. Fixed an intermittent misfire on a Z yesterday just by replacing the fuel filter. Wish everything was that easy.
also check your plugs... potentially replace them. a faulty plug can fire while free reving or idling but fail under load ie when boosting
Alright guys for tech section purposes. Coilpacks had fraction of a hair splits causing spark leakage + bad misfire. Check for tiny cracks in the thinnest part of coilpack. Hold near plenum(for earth) to check in there any spark leakage. Big thanks to Chris/ezzupturbo for his help!
