I have an itr supercharged with i/h/e and just recently i've been experiencing problems with my car its been backfiring, sputtering, spark plugs turning black and my a/f will fluctuate from rich to lean and than fluctuate a lot between lean and stoich making my car run like crap and return back to a good running condition my question is what would cause this? I've scheduled a dyno tuning session for this friday thinking my car is out of tune may this be the cause to this problem?

 

hey man, , my girl has a supercharged GS-R hatch and hers was doing the same thing get those colder NGK plugs from jackson or wherever u find em, then when u get them they will be pregapped. But i de-gapped hers to .034 and its running like a champ also i put a new cap on it aswell....good luck