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Q: How do I fix a high idle problem? on 1991 Nissan 240SX

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The car idled at 1100 rpms. I tried to adjust it with the idle screw, and it only dropped down to 900-800, and then the idle started fluctuating around that range as well. How can I fix this problem? I can't lower it any more with the idle adjustment screw.
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sounds like you may have a bad idle air control valve, i would replace it and see what happens, also check for intake leaks
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