RPM's spike when stopped or in Nuteral

1993 FORD MUSTANG
48,000 MILES • V8 • 2WD • MANUAL
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BKELLEY80
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93 Mustang LX 5.0
I had my idle set to about 1500 rpm, today when I was sitting at a light they shot up to 2500 rpm and wouldent go down even after I restarted it and turned the a/c off. I read somewhere this might b a leak in the header causing the sensor to over compensate? What you think?
Aug 18, 2011 at 4:07 AM
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RASMATAZ
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Clean out the idle air control valve and also look for a vacuum leak-
Aug 18, 2011 at 4:21 AM
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RASMATAZ
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Also go to this link: https://www.2carpros.com/articles/engine-idles-too-high
Aug 18, 2011 at 4:22 AM
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