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Ford Explorer Loud howling noise from air intake

 
Ford Explorer Problem
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Model Years Affected: 1996, 1997, 1999, 2000, 2002, 2003

Engines Affected: 4.0L V6, 4.0L V6 SOHC, 4.6L V8, 5.0L V8

Average Mileage: 142,160 mi (73,000 mi - 220,000 mi)

  •  Rookie

    Both V6 and V8 ford engines from various years sometimes experience a very loud low pitched moan or howl that sounds as if it is coming from the air intake area..

    The culprit is the Idle Air Control Valve. (I.A.C.).

    It is possible to remove and clean the IAC with the proper care but it is not advised to do so...Although it may work for a short time, it will eventually fail again and possibly force you to call a towing service when you least expect it..

    Price for the IAC varies from $70 to $120 for V8 and $30 to $80 for V6 models. This repair takes me less than ten minutes...

    Hopes this helps...I have replaced the IAC for 6 friends and family members who have also had this problem over the years..

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  • Visitor, , 4.0L V6, 220,000 mi

    My 96 Explorer has has this "howling" issue during hot weather for the past 10 years. I have changed the IAC 7 times and it seems to help. Slight increase in idle speed makes the howl go away. Last weekend it was "howling" again so I popped the hood, listend/felt around for a vibe and determined it was coming from the housing of the air filter. I released the clamp that secures the air filter housing and the howl immediately went away. Reseated the air intake duct back onto the airfilter and closed the clamp and the howl came back instantly. I don't think the IAC is causing my howl, but maybe there is some kind of interaction that isn't readily apparent. Seems to be a vibration around the air intake/filter assembly. Cleaned the Mass Airflow sensor and it made no difference. I bought a new, different brand of air filter and will see if that fixes it. Wondering if the howl is the result of air leaking past the rubber gasket portion of the air filter and causing the vibration/howl. Will post result when confirmed one way or the other.

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  • RDS, , 4.0L V6, 205,125 mi
     Rookie

    loud howing noise. will stop if I hit the gas padel. The noise will also stop if fan is turned on.

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  • Visitor, , 4.0L V6, 75,000 mi

    I had ths howling/vacuum sound coming from me Explorer at high RPM, followed all required suggestions ie replacing ISC and MAS sensors,it did not work. It turned out to be the FAN CLUTCH, replaced it this weekend, problem solved. I dealt with issue for about 3 months until I finally figured it out. Good lock

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  • dissers6, , 4.0L V6, 155,555 mi
     Enthusiast

    Loud howling noise but doesn't start til the vehicle has been warmed up and is almost instant during the summer. Nothing alleviates the noise and it is extremely annoying. But there has been no decrease in performance due to it.

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  • Visitor, , 4.0L V6

    Intake Howling. Replaced IAC, TPS, MAF, and howling comes and goes. No engine light. Installed clamps on air intake hoses. Car also downshifts at higher speeds causing the engine to rev high and upshifts back to proper gear.

    What?

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  • Visitor, , 5.0L V8

    i have the same problem... also find out it can be the oil is low or the cooling is also low. When i change one of the other it doesnt do it until the oil needs change again

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  • Visitor, , 4.6L V8, 135,000 mi

    howling from air intake area remove filter cover housing and listen and seem to be coming from there

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  • Visitor, , 4.0L V6 SOHC

    having the same problem. hoping someone comes up with a solution, lol. the noise drives me crazy.

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  • Visitor, , 4.0L V6, 73,000 mi

    Same howling sound, replace IAC valve, did not help.

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