At last, the beast roars!... and it really does, due to an exhaust leak. So, the whole stupid problem was that the kid who had it last mixed up the left and the right O2 sensor wiring harnesses... I don't know WHAT he was doing messing with that stuff... but it caused me three and a half weeks of headaches. Also, FYI, 31x11.5x16's are pretty much the biggest tires you can stuff under a vx without a lift...