After becoming frustrated and giving up on my car for about 6 months, I finally took my car to a shop in Berkeley and paid this guy $90/hour for 3 hours to help me diagnose my electrical problems. He was actually really nice and we did the diagnostics together. I have an HX chassis, EX motor, and modified DX wiring harness. He helped me fix a few things, but the main problem right now is that the computer isn't grounding the primary O2 sensor. He believes that my ECU could be fried, which it probably is because I crossed wires while working on the car at home. I need to borrow someone's working ECU (P2P) for just a few minutes to see if it at the very least eliminates my O2 sensor code. That way, I know I need to get myself an ECU. If you're also SELLING one, then that's even better, but right now I just need to know. If anyone lives near Hercules or around the San Francisco area, please let me know if you can help. Thanks guys.