Question about 1990 Mitsubishi Mighty Max

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Engine light and dont run

I have a 91 mighty max with fuel injection. the truck runs great until it gets warm and the engine light comes on and the the truck revs up and down and will only tac about 1000 rpms. changed plugs, wires, cap, and button. i have also changed fuel filter and gutted the catalytic converter. any suggestions or does anyone know how to get the codes for the check engine light?

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  • cwj83 Oct 12, 2008

    yes no vacuum leaks.



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Have you checked for engine vacuum leak and tested or checked airflow meter

Posted on Oct 09, 2008

  • tony yeatman
    tony yeatman Oct 13, 2008

    Is the pcv working .Not sure with your model but its usualy located on the top of the rocker cover .pull it out with the engine running engine should react to valve bieng removed also with engine running put your thumb on and off the end of the valve if no reaction you need to replace.the reaction should not be a delayed did you check for the vacuum leak?



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