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1999 Chevrolet Tahoe Question: It has a miss at idle and driving.Check engine light on. code po 300 and po 307



, 5.7L V8, Menifee, CA, March 26, 2013, 19:14

Number 7 cylinder plug was real black and burnt. rest were tan. And the cap and rotor was real corroded. Changed plugs cap and rotor. Cleared computer. Still got same miss and check engine light came back on with same codes. I can't believe the one injector for all 8 cylinders. Would make just number 7 misfire. And the plug wires were new last year. AC delco. Maybe a compression check on that cylinder.

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    Greg's Orange Auto (15380 Answers) , Orange, CA - (714) 361-9386
    globalhelper March 26, 2013, 19:24

    yes compression ck but sounds like wires to me again. are they burn"t at all

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    , March 26, 2013, 20:06

    Don't look burn't! I forgot to add. The spark is orange. Not blue or white. Going to check coil!

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