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  • diagnosis?

    1988 yj 2.5 TBI

    this thing has been trouble free for a long time, now i have a problem i cant figure out.

    it was pulled into the driveway a bit sluggish, so my wife left it and took the truck to work.

    i went out to see what was wrong with it, assuming she ran it out of gas again.
    it started right up for me, but the ildle roared to about 2800 and stayed there.

    it appears that the Idle Speed Actuator (isa) is keepng it there.

    i figure, pull the plug and it will let off, right? NO.
    i commence to pulling plugs on the rest of the crap that is on the throttle body, and there is no change.
    this damn thing still roars at 2800 rpm.

    so i put them all back... no change.

    any thoughts on this thing?
    there are no vacuum leaks that i hear or see.
    >>>>>>>>>>>>>>>>>>>>>>>>>>
    ERIK


    95 yj, locked lifted, and ready to rock!

  • #2
    Originally posted by NAILER341 View Post
    1988 yj 2.5 TBI

    there are no vacuum leaks that i hear or see.
    The leak is the only thing I can think of. I had a pickup that did the same thing. The only way I found the vacuum leak was with a spray bottle w/soapy water. Just a big enough crack in the hose to cause my problem.

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    • #3
      my jeep did that after sitting awhile in a shop, probably with the ignition on since they were leak testing the arb. anyway, disconnected the battery to reset the computer and everything was fine. not sure if the 4cyl system is the same but it's worth a try. :2:
      myJeeprocks.com

      "in the end... the rocks always win."

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      • #4
        I don't know anything about TBI, but found this....hope it helps

        http://www.affordable-fuel-injection...n%20System.pdf
        1997 TJ hp44/hp60-a lot of goodies

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        • #5
          Did you try my suggestion?
          [COLOR=blue]Chris[/COLOR]
          SAVE JOHNSON VALLEY!!! - CLICK HERE
          Ya Savvy?

          Motech Performance

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          • #6
            Originally posted by Dukes69 View Post
            Did you try my suggestion?
            i plugged and unplugged most of the wires under the hood. nothing yet.
            >>>>>>>>>>>>>>>>>>>>>>>>>>
            ERIK


            95 yj, locked lifted, and ready to rock!

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            • #7
              Originally posted by Dukes69 View Post
              Did you try my suggestion?
              Top 3 Dukes69 suggestions:

              3. Throttle cable could be stuck
              2. Rev counter is broken
              1. Try taking your foot off the gas
              "your jeep looks so hot!!"

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