Heh...long story short: I rebuilt my tranny and painted it Chevy orange. Ran one ground to the upper tranny mount ('89 Jetta) and forgot the one to the block. Start the car and poof shortly thereafter, my ECU is fried (put the key in accessory position and the fuel rail opens wide, filling each of the cylinders right to the top). Painted surfaces are not good grounds.
Take it to the dealer and he takes an ECU out of another car in for service. Blows that one. And another one. Lol...
STAY THE HELL OUT OF THE DEALERSHIPS!
;)
Or at least stay out when I'm there. It was a simple mistake that only cost me $150 to fix (I have a source for used ECUs). Too bad for the dealer.