Loud "howl" from engine
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Tuned
Joined: Jun 2005
Posts: 290
Likes: 44
Loud "howl" from engine
2000 Navigator:
When at a stop light or idling, every once in a while, maybe a few times in a week, i hear a loud "howl" like noise coming from the engine. it goes away the moment i give it gas and doesn't come back for a couple days. any ideas? thanks
When at a stop light or idling, every once in a while, maybe a few times in a week, i hear a loud "howl" like noise coming from the engine. it goes away the moment i give it gas and doesn't come back for a couple days. any ideas? thanks
Senior User
Joined: May 2004
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From: Denton, TX
Noises are always a bit difficult to diagnose online since people use different descriptions for same sounds.
Anyway... Could the "howl" you mention maybe also be described as "whine"? If so, I would suggest a slipping serpentine belt.
Anyway... Could the "howl" you mention maybe also be described as "whine"? If so, I would suggest a slipping serpentine belt.
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Tuned
Joined: Jun 2005
Posts: 290
Likes: 44
i agree with the difficulty in describing the noises on here. i don't believe it is a whine sound. imagine a train doing the typical choo choo, then that long chooooooo at the end. it is similar to that and as soon as you apply any amount of gas, it clears and will not come back for a few days.
New User
Joined: Jan 2008
Posts: 10
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2000
My wife has been going through the same issue. First they thought it might be the coil, replaced coil and gave tune up. Next they thought maybe tranny was the problem since vehicle was stalling when in drive or reverse only. Rebuilt tranny and still having problem. I will see what happens this week. It does not always stall. No codes have been found.
Senior User
Joined: Jul 2004
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I have posted that I had a whistle coming from the engine---using a smoke machine we found out it was a poorly fitting air cleaner---
Fram to be exact
also the idler pulley bearing can be bad --- causing unusual noises---
Just some ideas that are cheap and easy to check out
Hope this helps you
Fram to be exact
also the idler pulley bearing can be bad --- causing unusual noises---
Just some ideas that are cheap and easy to check out
Hope this helps you
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Senior User
Joined: Jul 2004
Posts: 249
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noises
also the belt tensioner pulley bearing can squeal---same bearing as tensioner---I've replaced both---on 2000 Navigator, 95K
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Hotshot
Joined: Jan 2004
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From: St Louis
It's probably doing what Ford calls "hooting" or what Contour owners lovingly call "moosing".
It's due to an air resonance in the intake tract, usually at idle, when the IAC valve is in certain positions.
Steve
It's due to an air resonance in the intake tract, usually at idle, when the IAC valve is in certain positions.
Steve
New User
Joined: Jan 2008
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Are you doing the work yourself? I have same problem even after all this work I had done in the last month. I am trying to find the part # so I can pick one up and do the work myself. I located the problem, the hose is pretty much worn out and vacuums into itself.
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