vpi scout 1.1 poping noise through speakers

I just recived my scout 1.1 every thing is sounding great except I get a loud pop through the speakers whenever I shut the motor down.The TT motor is pluged into the digital side of my furman pst-8 to try and isolate the motor form the phono pre.It has had no impact on the pop. I would appreaicate any help. Please let me know if I can provide any more information to help solve this problem