SPONSORED LINKS

Howling noise from air intake

Tiny
DAYALA
  • MEMBER
  • 1999 FORD MUSTANG
  • 6 CYL
  • 2WD
  • MANUAL
  • 150,000 MILES
Howling coming from the air intake. Replaced the Idle Air Controller and no change to the problem. Could something be cloging or restricting air flow?
Friday, July 22nd, 2011 AT 4:04 PM

7 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
Start at the air filter and check for any cracks and loose fitting, check for vacuum leaks at the throttle body, start here.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
-2
Friday, July 22nd, 2011 AT 11:01 PM
Tiny
DAYALA
  • MEMBER
  • 6 POSTS
Took off filter and intake pipe. Noise seems to be coming from air chamber going to the IAC valve. When power is removed from IAC valve noise stops but idle goes down real low. Could it be electrical? I removed throttle body cleaned it real good and replaced gasket. Going to get replace valve again to see if I got a faulty one.
Was this
answer
helpful?
Yes
No
+2
Monday, July 25th, 2011 AT 12:02 PM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
Do that and report back results.
Was this
answer
helpful?
Yes
No
Monday, July 25th, 2011 AT 1:29 PM
Tiny
DAYALA
  • MEMBER
  • 6 POSTS
Ok! Finally was able to work on the car. I replaced the IAC valve with another one also cleaned the MAF sensor(hot wires are not broken)and the EGR valve. Checked vacuum lines found small tare, but did not seam to effect it. Sound is still loud at start up then mufles down after car is warmmed up, but gets loud when RPM's go up. When RPM's are coming down engine idles rought. What else can I check?
Was this
answer
helpful?
Yes
No
Monday, August 8th, 2011 AT 12:43 PM
Tiny
ROBERTMICHAEL
  • MEMBER
  • 1 POST
I have almost the exact identical problem. Tried 3 different IACs did everything you've done and is still howling.
Description: As soon as the car is started the noise starts and then after about 30 seconds it will tone down. I notice when im driving around 5 mph and slowly press on the gas pedal it will go away and then reoccur once I get to 20 + mph. So I replaced the clutch fan fixed it
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Sunday, October 7th, 2012 AT 7:48 AM
Tiny
MARTIN LAXTON
  • MEMBER
  • 1 POST
I was just wondering if you were ever able to figure out the problem. I am experiencing the same exact problem. Any help would be greatly appreciated.
Was this
answer
helpful?
Yes
No
Saturday, November 28th, 2020 AT 3:00 PM
Tiny
I-SMOGEM
  • MECHANIC
  • 118 POSTS
The above figured out that the problem was their engine cooling fan clutch. A common symptom of a faulty fan clutch is an excessively loud cooling fan. If the fan clutch gets stuck in the engaged position, which is not that uncommon, it will cause the fan to fully engage even when it is not desirable, or designed, for them to be on. This may result in an excessively loud engine compartment noise from the fan constantly blowing at full speed. The sound may be easily audible and present at all times when the engine is cold or hot.

The other half of a faulty fan clutch is that is does not engage when it should, and thereby not cooling the engine properly. This could cause overheating issues.

Glenn
Was this
answer
helpful?
Yes
No
Monday, November 30th, 2020 AT 9:11 PM

Please login or register to post a reply.

Related Air Intake Tube Replace/Remove Content

Air Intake Boot and Tube Replacement
GUIDE
Air Intake Boot and Tube Replacement
The air intake tube or boot is used to connect the air filter housing and mass air flow sensor (MAF) to the throttle actuator body which is mounted to the engine's intake...
VIEW MORE

Sponsored links