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I saw in another area of this site people talking about the Idle Air Control Valve causing noise and idling problems. My 00 4.0L also has slight idle problem. In the other thread they seem to complain more about idle problems than they do noise problems so difficult to say if the IAC is the...

Just adding to my note above. The noise generally only lasts seconds. At the most 15 seconds. It can happen with the ac on, with heater on or with neiter on. I can go days without hearing it then have it take place daily. Can happen at idel or at speed. thanks.

New member. Not sure I'm in the right place. 00 Explorer 4.0L V6 SOHC with 59,000 miles. Loud whining sound coming from Air Cleaner Housing (air filter new). There appears to be no pattern to when the noise takes place. Sometimes before I even get out of driveway and other times on the hwy. I...

Also, I did not know you could trigger the control value to get the heat started like you posted. I did inspect the existing control value closely but did not realize that - I will try.

iboneward Keep us informed. My problem is no heat but could be same fix. Went to auto zone today and ordered a new heater control valve - to be in tomorrow. Today I flussed the heater core thinking it was clogged but it seemed fine. Clerk at auto zone said its either the control value or...