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

NEED HELP FAST!!!

Old 10-19-2006, 09:46 PM
  #1  
stangc83
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Default NEED HELP FAST!!!

My buddy took off his plenum and throttle body just to clean them out. Now there is a really loud whistle sound and the idle is all messed up. Everything seems to be hooked up right, what could be the problem.
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Old 10-19-2006, 09:50 PM
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00perfredgt
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Default RE: NEED HELP FAST!!!

sounds like a vacuum leak. check all the hoses etc.
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Old 10-19-2006, 09:51 PM
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stangc83
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which hoses would it most likely be coming from
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Old 10-19-2006, 09:59 PM
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00perfredgt
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Default RE: NEED HELP FAST!!!

any hose that goes to it . did you replace the gasket? check everything.
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Old 10-19-2006, 10:08 PM
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BleedinBlue
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Default RE: NEED HELP FAST!!!

+1 on the vacuum leak. If it bad enough you may be able to hear a hissing noise coming from the leak while the car is running.
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Old 10-19-2006, 10:18 PM
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ripper
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Default RE: NEED HELP FAST!!!

Sounds like plenum is leakin to me. Make sure you use a new gasket and try again.
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Old 10-19-2006, 10:20 PM
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stangc83
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Default RE: NEED HELP FAST!!!

got it fixed.. The hose on the back of the plenum was not completely on. fixed it right away.
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