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That's moosing! If your car is still under waranty, have the dealer replace the IAC - which should fix the problem.

If your car isn't under waranty, you can do the TH fix, which took care of the moosing problem in my girlfriend's cougar.

Just a random thing I noticed - when I did the TB optimization, I noticed the butterfly has a very small hole in it. I bought a 3L TB (which I haven't installed yet), which I also did the TB optimaztion to... that little hole was plugged full of gunk. I wonder if that also contributes to the moosing noise.

Edit: I just noticed you have a 4 banger. I'm not sure if they suffer from moosing too.

Hope this helps...

-Nick
 

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Originally posted by: slockin
Edit: I just noticed you have a 4 banger. I'm not sure if they suffer from moosing too. Hope this helps... -Nick
Yeah, mine's a 4, but the car in the video and the two others with this problem in our EURO-NECO Germany club are 2.5L V6. I mentioned to them that there's a TB hang problem and fix out there, but not being really familiar with the 6, I wasn't sure if that was the correct cause and correction for their symptom. Glad to see I may have been on to something.

At the very least, I seem to be learning something about my Cougars. :)
 

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Definately moosing...give spinnburn a pm...I know that him and his mom just fixed theres by re-running a hose...not sure which one but he would be able to tell yea.
 

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I bought an IAC valve from a guy who was parting out a motor. Fixed the problem on my Duratec.

That is DEFINITELY the moosing problem. SAVE THAT VIDEO AND PUT IT IN THE FAQ SECTION!
 
C

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Does it only happen at start up?
If so then you have just helped me as well.
Has happened since almost day one on my 2000
but since it never seemed to do much harm
I never followed up on it.

Definatly keep this vid around!
Thanks,

Chris
 

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Originally posted by: Cls2Edg
Does it only happen at start up?
Chris
Yep - on a cold engine, and only when the throttle is CLOSED. Notice if you open up the throttle, it goes away. That's because then your car's breathing through the throttle instead of the IACV.

Breathing through a cold IACV causes the noise.
 

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OK..... that was hilarious!

I read all about moosing on CEG, here, etc... but never heard it before on my car or anywhere else. Now you know why it's called moosing, eh? hahaha....

Good luck with the fix!!

Massiv.
 

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Just a random thing I noticed - when I did the TB optimization, I noticed the butterfly has a very small hole in it. I bought a 3L TB (which I haven't installed yet), which I also did the TB optimaztion to... that little hole was plugged full of gunk. I wonder if that also contributes to the moosing noise.
It may, but probably only if it's full of gunk, not the other way around. That's your idle air hole (I believe) and it's supposed to let a metered amound of air through the TB when your butterfly is completely shut. I shaved off a bit of my butterfly around the edge and it idles about 50rpm higher now.

B/c the IAC controls idle speed (as a bypass from your TB), plugging that hole may or may not cause it to engage more often.

Disclaimer: I'm an armchair mechanic w/minimal experience. This is just what I've been able to figure out.
 

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How hard is the IAC to replace? Is it an expensive part?

My car has been "moosing" for a long time. I'm glad I found others have had the same problem.

Thanks.
RJ
 
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