Question about 1998 Isuzu Rodeo

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When the rodeo is first started RPM increases and when put in park it does the same thing?

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How high are the RPMs and does it do it while the engine is hot? When hot, if the RPMs are high, do they also fluctuate? If so, you more than likely have a vacuum leak and you will need to look at all the vacuum hoses for cracks or breaks and repair as necessary. Let me know.

Posted on May 13, 2010

  • 4 more comments 
  • jastachurski May 13, 2010

    It will go up to about 3000 RPM it is usually hot because I would be at the store and get back in and it will do it..

  • Kori Policy
    Kori Policy May 13, 2010

    It really sounds like you're dealing with a vacuum leak. Take a can of carb cleaner and spray it at specific points around the engine, on the intake, anywhere there is a rubber hose. Does it ever go down? What does it go to in gear?

  • jastachurski May 13, 2010

    It will go right back down and goes into gear just fine. Do know exactly what hoses to check? And I know that the catalytic converter was just replaced would that have anything to do with it if so the dealer may fix that since it was just replaced yesterday?

  • Kori Policy
    Kori Policy May 13, 2010

    If the problem just occured, than yes they should look to see if something was damaged during their repair since they do need to go under the hood to disconnect the negative side of the battery before they start welding to avoid damage the cars computer. If this was a pre existing problem, then they are going to tell you that they will charge for the diagnosis. Look at any hose that is rubber and look for anything near the battery that they may have accidentaly hit while disconnecting the battery.

  • jastachurski May 13, 2010

    ok Thank you I will check that out and let you know what I find.

  • Kori Policy
    Kori Policy May 13, 2010

    Great. I'll do what I can to help get this fixed.

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