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Thread: high idle

  1. #1

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    1991 Mitsubishi Mighty Max
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    I.D.K.?

    high idle

    so i am new to this forum site i have a 1991 might max with the 2.4l 5speed 4x2 i got this truck about 8 months ago and had a couple issue with it not running right but i finally put im tach in and my idle is at 2k and it doesnt stay consitent some times its at 2.5k or 1k or under my roommate thinks its the mass air flow i think it might be the ecu since it doesnt wanna start right up all the time...the head was redone supposply by the previous owner but i think they just got all part out a junk yard and my it a frankin truck

    thanks for the help

  2. #2



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    The ecms on these trucks are prone to bad caps that cause erratic idle - there is a thread on here that gives the step by step on repair. A bad maf, bad or misadjusted tps, or bad vacuum hoses will also cause this issue. Make sure the intake, exhaust, throttle body, and intake hoses are all tight. Welcome to the forum - we need pics, condition not important.
    Pennyman1
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    Living the D-50 lifestyle since 1980

  3. #3

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    We should update the Do This First sticky with information about the bad caps -- this comes up so often and leads to so much unnecessary frustration and people being mislead into thinking they're bad trucks. They're not.
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  4. #4



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    Quote Originally Posted by noahwins View Post
    We should update the Do This First sticky with information about the bad caps -- this comes up so often and leads to so much unnecessary frustration and people being mislead into thinking they're bad trucks. They're not.
    Do it. Any thing to help.
    Members come and members go, But the board keeps track of them.
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  5. #5

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    I.D.K.?
    i dont see i sticky for this if you could just copy the link that would help alot thanks

  6. #6

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    I can help get your truck to pass California smog! PM me.
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