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I too hate drum brakes... That's why I don't have any anymore! :P

mmmmm......billet

It was distributor

@el_freddo I regret to say that I gave you some misinformation. O2 sensors WERE standard equipment on SPFI models. The Cali-spec used a 3-pin connector and the federal emissions (all the other states) used a 1-pin connector. I got confused since I bought my GL with an exhaust system without an O2 sensor bung. My guess is that at some point someone put a carb exhaust on the car as these didn't always have O2 sensors. Now I need to get an O2 sensor on my car. Which means welding up a new cat and splicing the wiring in that was removed. Hopefully now the car will get out of open-loop and I'll actually see above 22mpg.

I found the problem! Swapped throttle body top 2 layers. This include fuel pressure reg, IAC valve, and Injector. Runs fine now. Since the regulator measured good, and the IAC was swapped earlier, I'm going with the injector is bad.

Side mirror heater.