1989 Dodge Van Cause Idle High

1989 DODGE VAN
89,000 MILES
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ANONYMOUS
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What can cause it to idle high?
Dec 15, 2012 at 9:39 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
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Check for vacuum leaks and check the idle air control valve (IAC)
Dec 15, 2012 at 9:46 PM
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CARADIODOC
  • ✓ASE Certified Mechanic
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Usually a vacuum leak. Check for loose, broken, or cracked hoses. Try pinching off the large main vacuum hoses. If the idle speed slows down, pinch off or unplug and block the smaller branch hoses until you narrow it down.
Dec 15, 2012 at 9:48 PM
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