2007 Mercury Mountaineer You Start Car After Warm 50 Percent Time Rough Idle

2007 MERCURY MOUNTAINEER
72,000 MILES
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MATTFULLER
  • MEMBER
  • 2 POSTS
When you start the car after it is warm, 50 percent of the time it has a rough idle. But when its cold the car is fine. When it does have a rough idle, once you put it in drive or start moving its fine, traffic lights and everything it idles fine.
Nov 19, 2012 at 11:44 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,240 POSTS
Check for vacuum leaks and check the IAC (idle air control valve)
Nov 19, 2012 at 11:49 AM
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MATTFULLER
  • MEMBER
  • 2 POSTS
Is there a different type of IAC on this car, becasue I just replaced one on my truck, and know what that one looked like, but I can not find one on this car, I know that it will be on the throttle body, but did they start using something different or different looking?
Nov 19, 2012 at 2:10 PM
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