Loud howling noise from air intake on Ford Explorer

Average mileage: 148,727 (27,000–297,000)
Engines affected: 4.0L V6, 4.0L V6 SOHC, 4.6L V8, 5.0L V8
11 model years affected: 1995, 1996, 1997, 1998, more1999, 2000, 2001, 2002, 2003, 2007, 2015
42 people reported this problem
27 people shared problem details
1997 Ford Explorer- 4.0L V6205,125
loud howing noise. will stop if I hit the gas padel. The noise will also stop if fan is turned on.
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..
1996 Ford Explorer- 4.0L V6220,000
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.
1997 Ford Explorer- 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?
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.
My truck has the most annoying sound coming from the intake, loud and sounds like air being pushed out through the filter at low RPM's
2003 Ford Explorer- 4.6L V8135,000
howling from air intake area remove filter cover housing and listen and seem to be coming from there
2002 Ford Explorer- 4.0L V675,000
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
1997 Ford Explorer- 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
2015 Ford Explorer- 4.0L V627,000
Howling sound under the hood. But not all the time.
2002 Ford Explorer- 4.0L V673,000
Same howling sound, replace IAC valve, did not help.
1997 Ford Explorer- 4.0L V6 SOHC
having the same problem. hoping someone comes up with a solution, lol. the noise drives me crazy.
1996 Ford Explorer- 4.0L V6155,000
Howling noise from mass air flow sensor area.
dobynika, Schenectady, NY, April 20, 2014 05:31 hello from surrey b.c Canada. I have a 2003 explorer 119k that has been idling rough and making a howling sound about every 30 sec to a min.or when idles down. sound comes from the air filter intake.I read some reviews and took the advice of one owner. I removed the Iac valve at the throttle body and cleaned it with ford tune up spray. the inside was black with carbon. then removed the intake tube from the throttle body and opened the buttetfly manually and cleaned the inside of it . it wasy very black and full of carbon too. (soak the iac or use a tooth brush to scrub the inside) the truck runs 100% now. Very easy to do on 4.6 I had this problem for about a year and slowly got worse . even took to a mechanic and charged me 100$ but did not know the problem. remember when we were young and we had carburators we would use carbout or something like that .. this is the same thing just carb build up in your engines throttle body unit
1995 Ford Explorer101,253
my 1995 cougar makes a loud noise then cuts off
1996 Ford Explorer- 4.0L V6141,781
Same problem. Inconsistent frequency and duration. Noise started about a month ago and is annoying, but more importantly can be nerve-wracking if potentially dangerous.
2001 Ford Explorer190,000
Howls when idling/stopped at light but goes away when you press on gas slightly
2007 Ford Explorer109,875
2000 Ford Explorer230,000
I hear whistling sound coming from my car crown vic
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