how can u kno if you your pcm is bad have no spart .have changde all othere parts

Asked by Oct 30, 2016 at 12:16 AM about the 1998 Chevrolet S-10 2 Dr LS 4WD Extended Cab Stepside SB

Question type: Maintenance & Repair

1 Answer

60,965

Do you have spark and fuel? Spray some starting fluid down the throttle body. It should run a few seconds on the starting fluid. If so, it's a fuel problem. If not, it's an ignition (no spark) problem or the engine has jumped timing. Check for spark. If you have spark and it won't run on the starting fluid run a compression test. If all cylinders test very low or zero it's jumped timing. HTH. -Jim

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