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Idle Air Control Valve Issues


96stx

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Okay, I thought cleaning the idle air control valve would take care of the high idle and this annoying hum/whine. Used to, when the engine warmed up and the weather was hot, it would howl with a high idle. After flushing out with carb cleaner, the idle is better but it now howls up to about 2krpm!!! Do I need a new IAC, parts house wants 65 bucks? OR do I need to look at other components??

Thanks,

96stx:bawling:
 


snoranger

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50% of the time cleaning the IAC is just a waste. I dont even bother wasting my time cleaning them anymore, if they're sticking or slow.... I replace it.
 
cvar

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Yeah, that pesky IAC of mine was howling for months. Cleaning & changing its gasket & felt pad (under cap) didn't help. Replacing it worked swell, for me.
 

aspevacek

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Our 4.0 had a whistling sound at random RPMS and after running a smoke test on the engine I discovered a leak at the EGR feed tube where it enter the intake. I did the test on the engine cold then with it warm. Cold had no leak there but after it warmed it had a decent leak. May besomething to look at if you continue ot have issues.
 

96stx

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Answers

Thanks guys, I really appreciate the help. I'm going to look for a cheap source for the part, and check for leaks.

96stx
 

papasmurfor9

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get it online at like partsgeek.com way cheaper. i replaced mine and the "moose mating call" went away...
 
mitch4x4

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Just thought I would add, if you maintain your IACV (don't just clean it when it finally gives you problems). You can avoid the problem and the cost of a new unit. Its been working on my truck for 260,000km so far.
 
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