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

hissing noise coming from passenger side of motor

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Old 01-16-2007, 12:41 AM
  #11  
BleedinBlue
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Default RE: hissing noise coming from passenger side of motor

My BBK CAI gives a swoosh sound every time I step on the gas...it sounds like it is coming from the back of the motor, I think because the sound is resonating through the whole fender. I'd bet that is what it is...
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Old 01-16-2007, 12:50 AM
  #12  
96_LAstang
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Default RE: hissing noise coming from passenger side of motor

ok thanks, It probably is. im going to mess around with it tomorrow and see if i can pin point exactly where is coming from.
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Old 01-16-2007, 01:19 AM
  #13  
97tplsGT
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Default RE: hissing noise coming from passenger side of motor

my bbk cai kinda freaked me out by the sounds it makes, not so much on the throttle, but while its idling.....its prolly just "normal" for the bbks
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Old 01-16-2007, 02:30 AM
  #14  
jersey98gt
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Default RE: hissing noise coming from passenger side of motor

definatly the bbk intake i put it on 3 days ago and noticed it
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Old 01-16-2007, 02:32 AM
  #15  
96_LAstang
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Default RE: hissing noise coming from passenger side of motor

Is it really noticeable at low RPM ? Or when your driving normal, not getting into it at all ?

ORIGINAL: jersey98gt

definatly the bbk intake i put it on 3 days ago and noticed it
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Old 01-16-2007, 02:34 AM
  #16  
rbstang
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Default RE: hissing noise coming from passenger side of motor

check all the CAI make sure theres no leaks..
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Old 01-16-2007, 05:05 PM
  #17  
sstang
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Default RE: hissing noise coming from passenger side of motor

I'm pretty sure it's not my intake because it does it when stopped too. I knowthe sound of an intakeunder throttle anyways.The sound doesn't change when throttle is applied either, so I knowit isn't the intake tract.

To give a better example of the sound. It sounds likea tank of compressed gas is inside my dash and leaking out.
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Old 01-16-2007, 05:17 PM
  #18  
AJ06GT
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Default RE: hissing noise coming from passenger side of motor

ORIGINAL: sstang

I'm pretty sure it's not my intake because it does it when stopped too. I knowthe sound of an intakeunder throttle anyways.The sound doesn't change when throttle is applied either, so I knowit isn't the intake tract.

To give a better example of the sound. It sounds likea tank of compressed gas is inside my dash and leaking out.
Vacuum leak?
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