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Posted on Apr 21, 2009
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88 isuzu trooper has trouble idleing

It wont stay running unless im on the gas

  • Mike Butler
    Mike Butler May 11, 2010

    Have you tried removing, & cleaning I.A.C motor with throttle body cleaner spray & port it comes out of?

  • Marvin
    Marvin May 11, 2010

    is this engine fuel injected?

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  • Expert 353 Answers
  • Posted on May 23, 2009
Anonymous
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Joined: May 23, 2009
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Check fuel pressure, possible hole in fuel line in tank.
listen for spraying fuel while pump is running

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1992 isuzu trooper 3.2 DOHC 4X4 LOW IDLE GOES UP AND DOWN 750 RPM TO 1500 RPM

I had the same trouble with my 93 Trooper.

I went on a sensor-changing spree.

The one sensor that fixed this idle problem was the throttle position sensor.

You can get one here.

Throttle Position Sensor

It's very easy to change, and fixes the problem instantly.

Good luck.
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