Hi,

I hope someone can help with my problem.

Firstly, I have DSCI cold air induction, big intercooler, and a Blue Fin remap.
My ST use to boost to 1.2 bars (18 lbs). Now I am getting max 8 bars (10 lbs). I am also getting a different sound from the turbo now. A zzzzzzzzzzz sound. No the car is not falling a sleep .

I checked all boost hoses and they are good. Vaccum is about 20. This is good.

The Symposer canister diaphragm was busted so I removed it and blanked off the hose next to the Bailey blower valve I installed.

Can someone tell me if these symptoms are for a faulty Boost controller solenoid. Or what else can cause the boost problems.

Thanks.