I put a go fast boost controller in set it for 20 psi and it was leaking to 10 psi around 5 grand i found out i forgot to cap two hoses which i then caped. After that everthing went fine then i went with a reciric valve i put it in eveyrthing was tight and all the hoses were capped and had hose clamps on them and like clock work every gear 5 1/2 rpms boost leak from 20 to 10psi witha loud whistling sound. The i figured maybe it was the reciric valve and tightening everything down and still same thing so i put the stock valve back in and now its doing the same thing 20 psi leak 10 psi with loud whistling coming from the front left of the motor. Oh yeah modds are full turboback catless exhaust.

Any suggestions?

 

its like his ecu went into a safe mode opening the wastegate alot more once u hit 5 1/2 rpms any one else experiance this or know of a fix, his mbc is now set to 19psi