Thread: Car back together now I have a weird MisFire problem...

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  1. #1 Car back together now I have a weird MisFire problem... 
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    Well I finally got my car back together and running. Took the car out for a test drive and noticed I have a weird miss. When the car is in lower rpm's you can feel it more, especially in overdrive. It seems to buck in overdrive when going up hill.
    So I replaced the plugs, wires, coil packs, cleaned the MAF, checked for vacuum leaks, replaced the fuel filter and t still has a miss. I don't notice it when I'm on the gas so to speak.
    When I pulled the plugs #4 spark plug was black all the rest looked normal. Seems like the miss doesn't change idling when I pull the number 4 spark plug wire.

    So.... Thoughts? I was going to swap around injectors and see if I notice a difference.

    Last edited by TheGerm; 04-05-2013 at 08:11 PM.
    2000 GTP coupe, Stattama Turbo Setup, A/A intercooled, custom cam, Tischler heads, 3250 stall, Zzp trans, 1" GMR chain, 65# injectors MDP hood, MSP exhaust, and much more.
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