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Old 05-14-2014, 01:49 PM   #1
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Rpms hanging while shifting

Hey guys I'm having an issue with my car. It's a 02 mustang gt when I shift my rpms stay at about 2000 - 2300. They drop down after about 4 seconds. Have any of you had this problem before?

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Old 05-14-2014, 06:38 PM   #2
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The RPM's are supposed to "hang" in between shifts but if you think that there is something abnormal about it, like the RPM's are too high or they are staying high for too long, then the problem is probably a worn-out Idle Air Control valve. If you do replace the IAC I recommend using either the OE Motorcraft part or a unit manufactured by Hitachi.

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Old 05-15-2014, 08:07 AM   #3
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Here is how to test the IAC; and more info about the Hitachi and Nippon-Denso OEM units...
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