After I rebuild the mk3, the boost gauge didn't work. I looked around and it turns out I simply forgot the plug the pressure sensor on the d/s fender back in. So I did, and it still doesnt work. I switched out the sensor for a known good one from my girl's car, and it still didnt work. WTF?? What other parts are involved? I know the vacuum signal is good, I can put my finger on it and feel the vac. and the boost, plus with the known good sensor that works in her car, I dont see why it wont work now. Any ideas??