It’s throwing intermittent H54 “Low Voltage Fuel Relay” and C72 “LCD dimming output circuit open or shorted to ground” codes from the ALDL. I tested both the fuel pump and the fuel pump relay and both appear to be in good working order, which leads me to believe that those are phantoms codes spawned from another issue- especially because, out of the blue yesterday, it started like normal and ran for fifteen minutes. I shut it off and started it again and it ran for another fifteen minutes. The odd thing was that the Service ABS Light turned on. Let it sit overnight and it’s back to its old tricks. I cleaned the connections to the ECM, and replaced the battery since it was time anyway. Changed the terminal bolts on the cables too, since I was in there anyway, and they were corroded. My thought is this is a bad ground somewhere. I have the FSM, but I don’t know that I am skilled enough to check those grounds. Still pretty new at this. I’m leaning toward a bad ground or a bad ECM. The pulsing fan doesn’t seem to come up very often on the forum.

UPDATE: Well, I replaced the ECM, and it eliminated all of those issues…except now, I have a whole new set. Car starts and runs now, but it’s running pig rich has little to no power. Check engine light is on and is throwing half a dozen codes now including 15, 21, 43, and 53. I’m pulling my hair out.