[myskyon]

Originally posted by catca
I have done lots of searching here and on rennlist but need some help. Car is and 87 951 and has a low boost issue. It makes about 8psi max. Motor is stock.

Idle vacuum is about 16hg
Deccel vacuum is about 21-23hg
When I clamp the line to the wast-gate I get 12 psi max.
BOV holds vacuum.


My searching tells me my waste-gate is okay, is that right?

Where should I look next? Besides a cold motor stumble/hesitation the motor runs well (other than the lowish boost numbers). I have replaced a majority of the vacuum lines and tested the intake manifold gaskets for leaks.

Thanks for any insight....

Cheers

http://www.clarks-garage.com/shop-manual/exh-02.htm
um your waist gate is bad. when you clamp the line to the waist gate it should send your boost to over 20psi. i would look at the waste-gate. as for the cold motor hesitation /stumble let your car warm up for a couple of min before driving