Well I am having problums with the 1jz engine in this supra....It is running REALLY REALLY rich and the tach needle keeps going all over the place. Some times it is ok and other times it runs like shit. It sounds like I have a rev limit @ 3 k now sometimes. Tried the ignitor and it is not that for sure. Nothing to do with the cat or the o2 sensor b/c I unpluged both and still runs like crap sometimes good sometimes bad. Anyone know what might casue this ?