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What could cause the idle air control valve to keep failing

Tiny
MISCHKA85
  • MEMBER
  • 2000 MERCURY COUGAR
  • 138,000 MILES
I have replaced the iacv 4 times within the past 5000 miles and I have a loud humming noise coming from the air intake unit
Wednesday, September 21st, 2011 AT 3:45 AM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
Check voltage to the IAC to make sure it is within spec. If you are getting too much power to it, it will burn up. It is nothing but a very small electric solenoid.
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Wednesday, September 21st, 2011 AT 3:56 AM
Tiny
MISCHKA85
  • MEMBER
  • 3 POSTS
Voltage is in proper perameters, iacv is working properly and I just replaced the air sensor, I still have a loud humming noise and car dies once outta 3 times that I open the airbox while engine is running, cpu is not registering any codes and cpu seems to be fine, im at a loss of what this problem could be, it affects performance as well, rpm needles moves around while in neutral as well
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Thursday, September 22nd, 2011 AT 11:48 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
The only other thing I can think of is a vacuum leak, unless the fuel pressure regulator isn't working properly.
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Sunday, September 25th, 2011 AT 6:04 AM

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