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Weird Noise

94ExplorerSS

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City, State
California
Year, Model & Trim Level
94, no mods
I have been getting this weird noise latley comming form the engine compartment, when it is as idle. Its kind of a humming "whirring" noise, but when the a/c is on sometimes the noise stops. WHat is this? Is it he compressor or sumtin?
 






mrboyle

I Drive By Brail
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Montrose, CO
Year, Model & Trim Level
'95 Bronco '80 Toy
It could be one of several things. It could be the bearing in the A/C compressor clutch, it could be a bearing in the alternator, an idler pulley or even the belt itself.
 






Alec

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If it is very very loud, it is the IAC.
 






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