Humming/whistle sound from engine bay - Mustang Evolution

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Old 04-08-2014, 05:27 PM   #1
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Humming/whistle sound from engine bay

hey folks,

i have a problem with my 2002 mustang gt.
Since this afternoon there is a humming/whistle sound coming from the engine bay it sounds like an vacuum leak.

i just sprayed all the hoses with tb/carb clean but there is no change in the idle.

maybe you guys have any ideas on fixing this problem.

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Old 04-08-2014, 06:50 PM   #2
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Do u have a procharger?

---------- Post added at 08:50 PM ---------- Previous post was at 08:49 PM ----------

Jk man. Try cleaning your IAC. That may fix Ur bad idle. Idk about the whistle sound tho

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Old 04-08-2014, 08:05 PM   #3
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lol .. alternator will wine when its going bad.
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Old 04-09-2014, 01:08 AM   #4
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Doe Rae mi wins again!

If the sound is kind of like a deep hum that seems to be coming from the air intake, and it goes away when you rev the engine up a little, it's more than likely your Idle Air Control valve.
They become worn out and start to vibrate... That vibration is the sound that you are hearing.

If it is the IAC, you'll have to replace it. Cleaning will do no good...
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