Was installing an air fuel gauge on a 94 auto tt, Hooked everything up corectly now it seems like im geting no power to the ecu. I had a spark when a friend turned the ignition on. I have checked all the fuses and done light tests on other sensors that will have 12+ igition power and they don't light up either. I have also used a wirebrush on the ecu grounds to the chassy. The engine will try to turn over but just will not go. Im very stumped here and would greatly apprciate any help for i only have today to get this thing up and running again.