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Hello,
My check engine light came on Saturday while driving. I have a 2000 GMC Sonoma 4.3L. I stop at Advance Auto to have it check and the man said the #6 spark plug was misfiring.
He suggested that I change the spark plug; which I did the next day ! Then the check engine light came on again, and I had it check. This time it show my #3 spark plug is misfiring, and I'm not sure what to do now ?
sounds like a bad ignition module check for spark when it dies if you do not have spark at plugs check between coil and coil wire if still no spark most likely module it is under rear of distributer cap resembles a black wafer board with two electrical plugs
94 GMC Sonoma have fuel and fire but will not start replace rotor and spark plugs still will not fire and new feul filter and filter under can still no start any suggestions
Usually somewhere on the engine or in the engine compartment, there is a sticker with the engine specifications. The spark plug gap should be included. If not .032 or an inch should be close.
Good luck
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