2nd Gen R56 Cooper S Forge atmospheric BOV issue. Lost power, poor idle.

So I decided to buy a forge blow off valve for my 2010 mini s. I installed the valve and made sure all connections are correct, and that all sensor are seated properly. Knowing that I installed it correctly I figured it should work fine and would have a fun drive around town. Not the case. I lost quite a bit of power, it sound like the valve is open at light acceleration, and at idle it hesitates to stay running. Does anyone have experience with this, or have any ideas?

 

Could it be caused by a weaker spring on the bov?

 

It was fine before I pulled the recirculation valve. I have no codes, and torque pro shows that my parameters are in the green.

 

So I pulled off the intake, inspected all the vacuum hoses, looked at the instalation instructions, checked all the bolts for tightness. Everything is in the green. Ran torque 2 pro, and used my snap on solus diagnostic setup.....still no indication why this is happening. Manifold pressure across the board looks good, and still not pulling any codes. motor has 53k on it, and valves were blasted 4k ago. Nothing seems to be throwing a red flag besides the lack of power. From my torque 2 app I'm only showing 7 psi max. On Monday I was pushing 17-18. I installed the heavier spring and I'm not seeing any change.

 

So the issue ended up being the o ring supplied from forge. The o ring diameter wasnt substantial enough for it to create a seal against the seating surface of the turbocharger. Contacted forge with the issue and they are looking into it. Went to a local parts store and picked up a couple o rings. Works perfectly now. lag is noticeably lessened with the bov. A slight improvement over the stock valve.

 

The snap on solus does live diagnostics. It did pick up some abnormalities, but nothing off to the point of throwing up a flag.