what could cause the idle air control valve to keep failing

2000 MERCURY COUGAR
138,000 MILES
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MISCHKA85
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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
Sep 21, 2011 at 3:45 AM
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JACOBANDNICKOLAS
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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.
Sep 21, 2011 at 3:56 AM
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MISCHKA85
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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
Sep 22, 2011 at 11:48 PM
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JACOBANDNICKOLAS
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The only other thing I can think of is a vacuum leak, unless the fuel pressure regulator isn't working properly.
Sep 25, 2011 at 6:04 AM