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Thread: Engine trouble, 86' 2.5L

  1. #1
    Jarhead Jeeper Poolee MLMonk's Avatar
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    Default Engine trouble, 86' 2.5L

    So I just finished my Comanche lift/tires wise, and I took it around the block and it kept bucking every few seconds when I had the clutch out, but when I pushed it in nothing happened. The idle was really rough and was about to stall, but started fine. I drove it back up my driveway and the engine stalled and now wont start back up but still turns over. I just replaced the sparkplugs if that wouldv'e caused anything (the old ones were completely black). I bought the truck in December, left it at my friends until I got back in June. The engine was rebuilt 2 months before I bought it and only 200miles total on it. I was told it couldv'e been water in the tank, or bad timing. Would anyone have any suggestions to what will cause these?

    Thanks,
    LCpl Monk

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    Cant truck it, F--k it! USMC Motor T 3533/3536

  2. #2
    Chiks=Trouble XJ=:) CrewDawg15/22's Avatar
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    I know this is a duh suggestion but I just did it in the wifes burban, did you check your wires and are they on the correct cylinder? I replaced the wires plugs distributor cap and rotor took it for a spin and it started popping and bucking got back did a download and got a #5 cylinder missfire checked the wires and found that I had 5 and 7 crossed at the cap. Swapped them around and runs fine now.
    "If it Turns, Burns, Banks, and Rolls Crew Chiefs made it do it."

  3. #3
    MORE COW BELL!!! dilligas's Avatar
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    sounds like the timing is off to me
    Ben
    06 tj 2.4L 3" lift 32x11.50's

  4. #4
    Jarhead Jeeper Poolee MLMonk's Avatar
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    That might be a possibility, I did change all the sparkplugs, but I disconnected all the wires too, lol.

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    Cant truck it, F--k it! USMC Motor T 3533/3536

  5. #5
    covered in mud tickwomp's Avatar
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    i agree sounds like timing
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  6. #6
    Runs with Scissors Cjack350's Avatar
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    If it's been sitting since December you may have some stale gas in it. That sounds exactly what my CJ was doing when I brought it home. It had been sitting for quite a bit.

    It turned out to be a combination of bad gas and a broken float pin on the carburetor. I'm assuming that this Jeep has a carb? If so, take the air cleaner off and look in the carb. Use your hand to hit the throttle and look to see if all of your jets are spraying fuel.

    Once you get it running I'd recommend using a can of Seafoam in the fuel tank. It's petroleum based and it works wonders on old fuel systems.

  7. #7
    darwinism at its best irish1371's Avatar
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    could very well be the wrong plug wires on hte wrong plugs. Also from you ssaying that the old plugs were black you may want to get the carb rebuilt and tuned up.

    just a heads up if you do look down the card wear some safety glasses. if it back fires when your looking they may be looking to get ya 2 new eye balls
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  8. #8
    Jarhead Jeeper Poolee MLMonk's Avatar
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    Found the problem, one of the push rods was completely bent, and the other one wasnt even set in. The timing was fine, and the engine runs like it should now.

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  9. #9
    Runs with Scissors Cjack350's Avatar
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    Quote Originally Posted by MLMonk View Post
    Found the problem, one of the push rods was completely bent, and the other one wasnt even set in. The timing was fine, and the engine runs like it should now.
    What caused the push-rod to bend?

  10. #10
    Jarhead Jeeper Poolee MLMonk's Avatar
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    Not exactly sure what caused them, one was completely off the thing, the other next to it was bent. Probably a loose rocker.

    http://www.leatherneck.com/forums
    http://www.comancheclub.com/forums

    Cant truck it, F--k it! USMC Motor T 3533/3536

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