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My old car made a noise very similar to that when my boost gauge line melted. Basically it was like having a huge rip in the vac line that runs from the CBV to the intake manifold.
 

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Discussion Starter · #3 ·
My old car made a noise very similar to that when my boost gauge line melted. Basically it was like having a huge rip in the vac line that runs from the CBV to the intake manifold.
but that noise from a vac line?

it sounds exactly like a little electric motor spinning up with lots of power
 

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It only takes a very small nick on on of the compressor blades to get turbo whine. Any inlet tract parts upstream of turbo (air cleaner to turbo inlet) recently?
 

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Check for a vacuum leak but you don't seem to be over boosting thus no pressure leak. The turbo will sound like a dentist drill when its on the way out :-(
 

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Sounds like a boost leak.
 

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He is hitting 18 psi for those suspecting a leak...
Doesn't matter. A tiny pinhole leak would allow you to achieve max boost as the computer would adjust to compensate for it over time yet would still whistle. I was hitting 14-15psi consistently but found multiple boost leaks in my charge piping when I pressure tested.
 

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Doesn't matter. A tiny pinhole leak would allow you to achieve max boost as the computer would adjust to compensate for it over time yet would still whistle. I was hitting 14-15psi consistently but found multiple boost leaks in my charge piping when I pressure tested.
Fair enough. I just know that the OP did a pressure test and supposedly (key word) fixed all the leaks ;)

Connor, break out the soapy water again :D
 

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Discussion Starter · #16 ·
Fair enough. I just know that the OP did a pressure test and supposedly (key word) fixed all the leaks ;)

Connor, break out the soapy water again :D
I'm goin to have to I guess...to bad it cannot be done til this weekend lol.
 

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Or you can just go ahead and buy a GT3071R !
 

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+1 and give it to me.
 
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