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4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

Loud noise

Old 12-07-2013, 11:28 PM
  #1  
Prpfire3
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Default Loud noise

Ok so new to mustangs every once in awhile i get this loud hummm or moan mid kinda pitch its happens within the first min or three of starting motor does it for 10 sec or so then quits its random and has only done it 3-5 times any ideas once u give it gas and start moving it stops. It runs and drives great no other problems
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Old 12-08-2013, 10:58 AM
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Prpfire3
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Any body have any ideas
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Old 12-08-2013, 11:06 AM
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tadpole1969
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its your abs pump up front on passenger side of car right in front of the radiator mine does same thing mechanic told me it was the cause herd it for my self also while it was up on rack thats the reason when you let of the break sometimes it will stop other times it will continue
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Old 12-08-2013, 11:52 AM
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cliffyk
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It is a worn IAC valve--read more about it here...
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Old 12-08-2013, 05:49 PM
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Prpfire3
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So i guess thats a sign to get a new one thanks guys
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