Howeling noise on 4.0L intake? - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 07-26-2005
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Howeling noise on 4.0L intake?

This problem is on an Explorer but it's the same engine as a ranger so I figure someone here might know. A friend of mine has a 4.0L explorer, I'm not sure of the year but it's got to be a late 90's or newer. The engine air intake makes this really loud howeling noise. It is not coming from the air box, I can open that up and listen to the noise coming out of the air hose leading to the intake. I cleaned the IAC, made no difference. I haven't take enough of it apart to see if it is the MAF causing the noise.

Anyone else have this happed? If so, what did you do to fix it. The damn thing sounds like a Moose giving birth.
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Old 07-26-2005
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Mine does that. It's the IAC on mine. Happened after I chopped my airbox all to hell to allow more air in....maybe it's the same thing? It's like a $60 part to replace and it's easy as pie
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Old 07-26-2005
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yeah if it sounds like a vacum cleaner then its prob the IAC like Bryan says
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Old 07-26-2005
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Damn it. I flooded it with electrical parts cleaner and put it back on once it dried. Is there a better way to clean it more completely or should I just have him get a new one and I'll replace it.
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  #5  
Old 07-26-2005
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I don't think it's dirt, it's just in need of replacement.
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  #6  
Old 07-26-2005
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Replace it. I had to do mine at like 50k miles. Took me forever to figure out what it was. 60 bucks is about what I paid for it at autozone. Itz not typically a instock part so you have to order it.
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  #7  
Old 07-26-2005
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It is the IAC ...
cleaning it wont help..... its worn out ... the valve inside starts to vibrate when moving the air through..causing the hummm... easy fix
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  #8  
Old 07-27-2005
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whats the IAC???

how do u replace it???

mine does this same thing.....

hhhhhellllppppp meeeeee :D haa
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  #9  
Old 07-27-2005
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intake idle control valve. real easy to replace. itz the solenoid on your intake maifold. Unplug it, remove the two lil bolts, and install the new one in reverse with a new gasket. Pie
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  #10  
Old 07-27-2005
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i'm dumb...need pics.....hahaha

but thanks for helpin
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  #11  
Old 07-27-2005
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Definitely IAC.. it wears out as mentioned..
There is no hardened sleeve or anything.. its just metal
and wears out.

Rand
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