Strange Misfire R32 Gtr

[oRiCLe]

Hey guys, just got my engine back and running it in at the moment, im finding that when i accellerate at about 30% (normal acceleration) sometimes it will cough and splutter a bit, but when i accelerate harder it will spool and rev what seems to be fine, the timing is spot on...

anyone got ideas?

it was running and revving fine before i got the engine rebuilt so dont not sure what the problem might be...rebuild is just standard with forgies so shouldnt need tuning i wouldnt think :S

[itbmils]

Hey guys, just got my engine back and running it in at the moment, im finding that when i accellerate at about 30% (normal acceleration) sometimes it will cough and splutter a bit, but when i accelerate harder it will spool and rev what seems to be fine, the timing is spot on...

anyone got ideas?

it was running and revving fine before i got the engine rebuilt so dont not sure what the problem might be...rebuild is just standard with forgies so shouldnt need tuning i wouldnt think :S

do u have a PFC ?

[oRiCLe]

nope, its running the standard computer at the moment...

[Blitz]

If you are using the stock ECU you might want to do a diagnostics check.

Sounds like an 02 sensor issue to me

[oRiCLe]

ran the diagnostics check, all came back 55 A.OK did the o2 sensor check and it measured lean and rich when u rev it, cleaned the AFMs, replace the fuel filter, checked the coils...still has the little cough when accelerating like it skips a few beats as is is revving...:S

gonna check teh gaps on the plugs today and see if that helps, still quite strange tho :S

[AlexCim]

what boost controller?

I was getting a stuttering issue when i had my boost controller tuned un-well. It was when the thing was switching between load points changing my boost within 100rpm, so it was stuttering.

[oRiCLe]

factory boost control at teh moment...

re-gapped the plugs a bit smaller, seems to run a bit smoother, still has the cough when i am accelerating around 3000rpm, if i put my foot down (a little or a lot) it will usually go cough cough splutter, vroom alot more drivable tho, i now have power below 3000rpm which i diddnt have before...

could it be anything to do with the igniter on the rocker cover as i have replaced the coils with known working ones, and checked that loom from the igniter to the coils...

getting there