I,m new here but I feel I will find real help here. Ok, I,ve a teg,92 ZX dual carb....having prob with idle...checked the IAC but still having probs+ i,ve black spark plugs in 3 And 4. When I start my A/C the idle goes from .8 to 1.4! I on tuning perhaps since my birth! need some suggestion guys. thanx.