I have a 97 SE. Since owning the car I had a series 1 supercharged motor in it (ran great) and over the summer I just put a new series 2 supercharged in it (ran awesome...for a while). Also, the throttle body has been replaced with a larger/milled out one, 3" downpipe has been installed, and cat has been removed (gotta love living in michigan).
After fixing up various electrical problems, I have a new issue that I can't seem to figure out.
Under light acceleration, it'* fine. Under mid-full throttle, I get misfires on ALL cylinders. This generally happens around 3500-4000 rpm. Occasionally though, it will get past the "bogging down" and let the RPM'* go all the way to 6000+ and run like a bat out of hell. Also, if I floor it from a stop, it usually won't misfire...it'* most noticeable when accelerating to pass someone for example. Note - this just started happening a few weeks back. Aside from having bag plugs/wires which were recently replaced, it ran awesome up to this point after putting the motor in.
Also, I'm getting a consistent rich condition with the only code thrown is p1133 - my scanner tells me this is from the front O2 sensor not toggling.
Could it be a fuel issue? Due to it running so rich, (and judging by my black exhaust tips), I can only assume it'* an A/F ratio problem. I'm going to change my fuel injectors - one could be leaking, or maybe they just can't keep up under boost? MAF, MAP, TPS, etc,. sensors all checked out to be fine when redoing the wiring.
Could it still be an electrical issue? If all cylinders are misfiring, but showing no codes to relate to this, maybe the battery cables are dirty not allowing sufficient power under heavy load...I don't know...I'm frustrated and taking that loan out for a 92' Typhoon is looking all the more tempting
Any insight would be greatly appreciated.
Thanks a lot!