well I can't help you troubleshoot but I can share a small issue I had with mine...

when i get in my car and crank it up, the TC would come on and u'd hear a rubbing...
The end result the last Jackace I let do my brakes F'ed 'em up, my front brakes we're dragging on my rotors upon start up...had to hit the brakes hard to make 'em flex off the rotors