R32 Series I With Issues

[dcruzer]

Guys I've got a r32 series I skyline. My exhaust is blowing out black carbon like smoke. I changed my ignition coils and the sparkplug which where burned. I also have misfiring when I give more than 10% aceeleration. Any clue what I need to replace? O2 sensor is part of the issue I was told but Anything. Need the helpful suggestions!

[Dose Pipe Sutututu]

O2 wouldn't cause that, it's purely for closed loop feedback on cruise to achieve stoich.

Could be a faulty AFM too, causing it to run very rich.

[jjman]

yep sounds like an AFm problem or a solid boost leak.

have you checked all of your piping?

[Moodles2]

Does it misfire when dead cold, or only when warmed up? If only when warm, look at the coilpack ignitor module or the CAS.

[dcruzer]

I've checked all the piping and its all fine. I'll have a look at the ignitors, thanks. Would the ECU be an issue to cause misfire? It's misfiring when I push the accelerator past a certain point both on cold and warmed up.

[Moodles2]

Throttle position sensor might need adjusting. Should read 0.4-0.5 volts at 0% throttle, and about 4.something volts at 100% throttle