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Thread: 89 jetta erratic idle

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  1. 89 jetta erratic idle 
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    Hey there, I have an erratic idle when the car is at any temperature, Sometimes the rpms will rev up to 1200-1400 and hang there for a few seconds, and when it doesnt do that it will bounce from under 600 all the way up to 1400 sometimes going up to 2000. I have had the temp sensor(blue thing) replaced and it seems to have made the problem a little worse. I have no idea what it could be and the mechanic i am taking my car to isnt being very helpful. Would love any suggestions. My battery also died recently when i left my lights on when i went into work, could this have been a part of this. Thanks
     
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  2. Re: 89 jetta erratic idle 
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    Not sure which engine your Jetta has but I used to have a Jetta 16v which I loved and still miss to this day.
    Here's some suggestions:
    Change your mechanic - it sounds like he doesn't know how to fix it.
    Is your throttle cable moving smoothly? sounds like something's sticking. If you have a carb something could be sticking in there?
    Not sure about your battery prob really having much of an effect on the idle problem, but I might be wrong.
    Hope I've helped.
     
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  3. Re: 89 jetta erratic idle 
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    Possibly a knackered Idle Control Valve. Is it an injection model?

    Just realised another very old thread.
    Last edited by euroslap; 17-09-2008 at 11:49 AM.
     
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