Question about 1994 Chevrolet S-10 Blazer

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1994 s10 misfire on number 2 cylinder

Idle is fair but under load I cant make power. Plugs, wires and one coil pack has been changed. I even swapped the two coil packs but #2 has a misfire. I put my timing light on all of the wires and observed. #2 has an ocasional miss and i can tell not only by the light but the engine sound when the strobe stops for an instance. What is upstream from the coils? I cleaned all conections and switched the coils multiple times. #2 always comes up with the miss. When I gun it in any gear it stutters then takes off even on the highway. HELP ME.

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  • Tommy Walker May 11, 2010

    WOW! What were the diagnostic codes?

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  • 15 Answers

You have coved all angles i would have looked at maybe it has droped a valve?

Posted on Feb 14, 2009

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If the above don't get no good results, it's not an ignition problem, then you will need to check compression on number one cylinder. Look for any mechanical problem from low compression. 3 major causes of misfires: gas, spark, or compression.

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You didnt mention having changed the spark plug wires, so that is another item that could be culprit as well. As well, it could be a coil pack that is not working properly.

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