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Thread: newb!! 1990 MM 3.0 4x4

  1. #1

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    1990 Mitsubishi Mighty Max
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    I.D.K.?

    newb!! 1990 MM 3.0 4x4

    my cousin just gave me a MM with a rusted tank. I am currently cleaning it out with muriatic acid and gonna install a new pump. after that maybe some wranglers and we'll see what happens!! Maybe some pics later

  2. #2

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    Good to have you, Ch1mp, and great avatar.

  3. #3



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    Welcome to the forum. There seems to be a lot of issues with fuel tanks doing exactly what yours did, rust. Be sure to get it as clean as possible and probably a great primer and some under coating over it to protect it for the next 20+ years. Replace the rubber lines as well, which I'm sure your going to do. Pumps can be found at RockAuto.com or your neighborhood auto parts stores.

    Enjoy the forum

  4. #4

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    I.D.K.?
    got the tank cleaned, installed w/new pump from high flow fuel systems, jumped it off and it runs like a champ

  5. #5

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    I.D.K.?
    ok... finally got the title for the truck and went to go get it changed over. The truck starts up and idles great. I get to the main road and it has no power and tries to die when i give it gas, so i turn around and have to limp home at about 5mph anything over and it wants to cut out. I drove it today because I got off of work early and it runs until it gets warm and then does the same thing. I cut the cat off and drive it to my friends house(about 2 miles) and it runs great again. On the way home it runs great then starts the same thing but I can go about 45.....I need help

  6. #6

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    1990 Mitsubishi Mighty Max
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    I.D.K.?
    ok... finally got the title for the truck and went to go get it changed over. The truck starts up and idles great. I get to the main road and it has no power and tries to die when i give it gas, so i turn around and have to limp home at about 5mph anything over and it wants to cut out. I drove it today because I got off of work early and it runs until it gets warm and then does the same thing. I cut the cat off and drive it to my friends house(about 2 miles) and it runs great again. On the way home it runs great then starts the same thing but I can go about 45.....I need help

  7. #7

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    1990 Mitsubishi Mighty Max
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    Did you replace your fuel filter?
    1990 MM 4x4 3.0
    1991 MM 4x4 3.0 Diamonte
    1994 MM 2wd (work in progress)

  8. #8

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    Also, if it was sitting for a while the fuel injectors may need to be cleaned.
    1990 MM 4x4 3.0
    1991 MM 4x4 3.0 Diamonte
    1994 MM 2wd (work in progress)

  9. #9

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    ok just got the fuel filter and some injector cleaner.hopefully cleaner will work cause i can't do 30bucks an injector to get them cleaned right now anyways I'll post n update....and thanks for the advise

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