I had a diagnostic code 520194 7 and i fixed the contacts from touching in the throttle housing. Disconnected/Reconnected the battery to clear the code. 30 seconds later the check engine light comes back with a code 3597 3, ECU voltage output to high. Machine starts to surge to high RPM at idle, up and down. Running rough. Any help is greatly appreciated. I have been searching and can't find much on the cause of the code.