1990 Jeep Cherokee idle speed

1990 JEEP CHEROKEE
251,000 MILES • 6 CYL • 4WD • AUTOMATIC
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KWROBINSON1954
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  • 1 POST
After starting and driving a short distance, the idle speed never goes below 1000 rpm. When I put it in park or neutral it reves up to about 1800 rpm. I have changed the ldle relay, map sensor, and cleaned and the idle control valve. The throttle postion sensor was changed about a year and a half ago. Any ideas.
Mar 31, 2009 at 4:42 PM
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JACOBANDNICKOLAS
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Has the check engine light come on? Have you checked for vacuum leaks?
Apr 7, 2009 at 8:37 PM
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KWROBINSON1954
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  • 1 POST
No check engine light, and I have checked vacume hoses and lines. I have also used a vacume tester, and all appears normal
Apr 8, 2009 at 9:42 AM
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