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High pitched Howl in the air cleaner tub

Tiny
CARHINE77
  • MEMBER
  • 1996 FORD EXPLORER
  • 2.0L
  • 6 CYL
  • 2WD
  • MANUAL
  • 208,000 MILES
There is a high pitched howl in the air cleaner tube. What could be causing this?
Sunday, September 18th, 2016 AT 11:47 PM

4 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 33,743 POSTS
Move things around while the noise is occurring, and pay particular attention to the hose clamps at each end. Besides the noise, there cannot be any air sneaking in that does not go through the mass air flow sensor in that tube. If any air gets in that bypasses that sensor, it wont get measured, the Engine Computer wont know about it, and it will not command the proper amount of fuel to go with that air. Also look for any cracks in that tube caused by dry-rot. A crack or other leak that is small enough to cause an audible noise like you described is typically small enough to not have a serious effect on engine performance.
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Monday, September 19th, 2016 AT 12:09 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
It might also just be air passing through the IAC. If this has the remote IAC, the tube leading back to the throttle body has been known to cause that also.
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+1
Monday, September 19th, 2016 AT 8:38 AM
Tiny
CARADIODOC
  • MECHANIC
  • 33,743 POSTS
Thank you. You're a wonderful human being!
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Monday, September 19th, 2016 AT 3:19 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
LOL. Thanks
I'm still not giving you my lunch money
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Monday, September 19th, 2016 AT 3:23 PM

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