Question about 1992 Mitsubishi Eclipse

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Misfire at cruising speeds

Car misfires at cruising and idle. It doesent misfire on heavy acceleration and it wont misfire when its raining or damp out. I have replaced a lot of parts and tested many things like injectors vacuum lines. the misfire started right after i changed out the wastegate I have also swapped another wastegate in and its still misfiring.

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Buy some gas line antifreeze and try that as it could possibly be water in the fuel... not expensive to try and if i'm correct will save you alot of money in replaced parts. add two now and one each time you fill up.

Posted on Jan 24, 2009

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heh, you might want to change the title here as I am pretty sure you cant idle under heavy acceleration.
However I think you were on the right track with the plugs and wires. You didnt mention the cap though and that is usually the biggest culprit in damp weather. Put a new cap and rotor on it and see if that doesnt do the trick.

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