WesM951

I'm having a weird boost issue. I only notice it in 1st gear, if i give the car half throttle I get NO boost. If I mash the gas I get nothing untill about 4k and then it hits, all 15psi. Its very violent with tire spin and everything. This just started happening about thurs of last week. I have not changed anything on the car except for the oil on the 1st of the month and it has maybe 200miles on it. (before I would get a gradual boost increase starting about 3200 and continuing till redline)

What would be causing this? CV, WG, Bypass?

jgporsche

I was having a similar problem when my stock bypass valve "popped"

WesM951

Hmm.. mines about 2yrs old. Its a saab replacment one.

I can tell you if I let off while on boost I get a nice sound coming from the bypass. Not sure how to describe it, but i'm sure you guys know what i'm talking about.

IPSC

I was told that to check a BOV you simply remove the thing, then press the diapram up against the spring pressure from the bottom. Then put your other finger over the top vacum line input and then remove your finger from the bottom. The Diaphram should stay up as you have sealed off the top. If it pops back down the BOV is bad. I went to a 993 BOV myself.

IPSC

toddk911

The "turkey gobble" sound???

Then it is time for a new one or updated Forge/Billit one.

WesM951

Todd,
Yep the Turkey Gobble sound.. haha.

This time I'm definatly going with the Forged one.

toddk911

OK.

yea, I have the Forge unit and it is real nice. Can open it up and adjust spring tension by adding shims or go with softer spring etc.