light squeal? vacuum leak?

**lrg8683** · 10-09-2008 04:24 AM

in part throttle holding anywhere between 5-10 psi i hear like a light squealing sound..sounds like it's coming from the the rear of the enging.. could it be a vacuum leak? or the hoses associated with the n75 and MBC..

there's no noise at full boost, and no loss of power either.

**S4_NE** · 10-09-2008 06:21 AM

ar eyou talking about turbo spool, i notice din your sig that you just went stg3, K04's with Dp's will sound louder that stock K03's

**RuS4ty** · 10-09-2008 10:07 AM

your turboz are blown

could be vacuum leak, what vacuum is the car sitting at at idle/peak boost? pressure test yet?

another thing it could be is the tranny, sometimes they have a dull whine when they are crapping the bed.

**VinNyS4** · 10-09-2008 01:37 PM

i just put in a mbc and took out my n75 yesterday and im getting the same noise. its like a hum or a squeal can really describe it and it only happens at 5-10psi and i think its right when i left off the throttle

**lrg8683** · 10-09-2008 09:06 PM

Originally Posted by RuS4ty

your turboz are blown

could be vacuum leak, what vacuum is the car sitting at at idle/peak boost? pressure test yet?

another thing it could be is the tranny, sometimes they have a dull whine when they are crapping the bed.

it's def. the sound of air like escaping from a tiny hole.. idle is 21 in hg and boost holds at 22 just fine.. but at part throttle it's like a tiny squeak