idles at 2200 rpm's?

1991 FORD F-250
105,000 MILES • V8 • 2WD • AUTOMATIC
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NANCY CHRISTIAN
  • MEMBER
  • 1 POST
replaced the ECM, engine runs very good but idles high at 2200 rpms. This is the second ECM replacement. Transmissions shifts fine, everything else seems normal.
Dec 15, 2007 at 9:22 AM
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DAVE1.1
  • MEMBER
  • 2 POSTS
you might want to check the I A C, idle air controll.
Jan 31, 2009 at 12:44 PM
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STRAILER
  • ✓Experienced Mechanic
  • 55,682 POSTS
I agree with DAVE1.1, it sounds like the IAC valve is stuck open and needs replacement, here is the location of the IAC and how to change it out. This guide should help as well.

https://www.2carpros.com/articles/engine-idles-too-high

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Oct 29, 2024 at 9:27 AM
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