Like a short in the wire? I have shaken all the wires and harnesse nothing happened. What kinda ground to the motor are there ---I checked the one to the fire wall and battery negative to motor both look fine any others I missed

 

i meant does it look like any of the wires are next to the exhaust,if the cps gets to hot it can cause this.

 

I will checked that out and see what happens

 

next time this happens check the resistance on the cps,terminals b and c,see if it reads open or close to it.
Also remove a plug and use the plug to check for spark and see if makes any difference.