P11SR20DET
New Member
My GTiR DET is smoking black, and not idling properly. It has been throwing some black residue from the exhaust for some time now. We pulled the plugs (iridium bkr7 installed about 4-5 weeks ago) and they appeared black. It seems there is too much fuel being metered in. Could this be due a bad O2 sensor? Or IACV ? MAF? Coolant temp sensor? Without a diagnostic, is there any way to check the O2 sensor?