i thought i had a bad bypass valve but jus left y buddies shop and we vacuumed test the valve and it holds pressure on both ports like i push the arm up and the cap the noippple and the arm won't drop till i uncover the nipple and the arm moves smoothly what else could cause no boost it gets to maybe 2 psi by like 5500 i don't hear marbles like a bad coupler and I'm almost positive the belt is not slipping its a 05 ss lsj all stock supercharger wise only exhaust and longtube header
could it be a bad boost solenoid i tried un plugin it and it made no difference i am at a loss and i need to fix this with in like 2 days cause i g=have to drive back to school 3 hrs and won't have any tools to use their

 

you have a thread about this the problems and service section repost this in your thread over there