Elspa

Hi there,

I just finished installing my procharger kit, but when I put some throttle on it just enough for the supercharger to build up some boost on i, it hesitates badly, it picks up again and then hesitates again. I also got a lean bank1 error code.

So I did a pressure leak test, and the sytem cannot hold any pressure, not even 2 psi . I push 90 psi with a compressor in the pipes and all of it runs out.
I here the air venting from around the bypass valve, even though it's closed (if I open it the sound changes and the air gets out quickly). The bypass valve is connected to a good vacuum line from the intake manifold (I checked that line also). I have the metal valve type, not the platic one.

I really don't know if it is the valve itself that leaks, since I have to take th bumper off to see clearly, but the sound is coming from there.

What do you guys think ? I'll do the full checking tommorow but just wanted to know that if it's normal for the valve to loose that much pressure, or should the pressure hold a decent amount of time.

thanks.

bigray327

If it's one of the black plastic Bosche ones, do yourself a favor and throw it away and upgrade to something better. There are several good ones to choose from, and sadly the ones that come with many of the kits are just crap.

How much boost are you trying to run?

Elspa

10 psi, is the procharger metal valve:

http://image.gmhightechperformance.c...pass_valve.jpg

I took the valve off, and looked at it, it doesn't seem broken but you can tell from the start that when it's closed it will not fully seal because of it's design...

Elspa

from what I understand these leaks are common, my car makes 11 psi on the gauge...so I think everything is ok dispite the leaking...