Thread: Strange shifting & Idle issue

Originally Posted by Turbocharged400sbc

You're going to need to scan the ECU while driving to simulate the condition my guess is you're going to find all sensory inputs going sporadic while it happens probably due to a bad ground somewhere and it's very possible that when the radiator fans/high loads/built up heat at resistance point... are required.
that it is killing the ground circuit for the ECU and causing a voltage drop which causes all sensor inputs to be wrong.

Good idea. That's where I'll try next. I know a Trans Specialist about 40 min from me that should have the scanner. Should be acting up by the time I arrive.