Question about 1994 Isuzu Pickup

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1994 Isuzu pickup Drivability Issues 2.2l carburettors

I have a 1994 Isuzu 2WD SWB with 58000 miles just received from my parents since they were tired of paying mechanics to try and fix it.

The truck alternates between revving extremely high as if the choke or fast idle circuit is on and stalling. Occasionally it will diesel when the ignition is off. It's worse when it's cold and sometimes runs normally. I haven't been able to mentally map to any particular air temperature (we run -20F to +80F in Ottawa), humidity fuel, etc. We run brand name regular gas.

The truck seems to lack power but my other car is a modified WRX so it could be a matter of persepctive. Still it tends to lose steam on long steep hills on the highway often requiring a downshift to 4th.

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  • gw_1749 May 14, 2009

    Thanks folks.

    Gas is of regular grade, I could try midgrade to see if there is a difference.

    I will look for vacuum leaks this weekend, thank you.

  • billie ramos
    billie ramos May 11, 2010

    maybe you are using very low octane gasoline....since low octane gas seems to cause knocking or auto ignite from compression rather than from spark.

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Have you checked for vacuum leaks

Posted on May 14, 2009

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