Ok I have I 04gtp and when I start it up it runs fine but when it warms up I'm hearing a loud grinding vibrating kinda noise its loud as hell so I replaced the sc tension pulley and top sc idler pulley not the bottom one noise still there so I take the belt off the sc and the noise is gone and wit the sc belt off I step on the gas the sc pulley spins fast then just stops spinning with the belt on sc works fine boost is normal it really sounds like to me the tension on the motor not the pulley the whole tension I put a screw driver to it and it sounded rough I changed that pulley still same noise but I know it can't be that cause when the sc belt is off I don't hear it somebody Helllllp!!!!
