[EauRouge]

I did a search and I found some great electrical diagrams of the fuel system that helped with some of the diagnosing I was able to do. However, I was not able to find anything relevant or similar to what I am experiencing.

I am having a problem with my 86 930 that is not driven regularly. Not sure if the following info is relevant, but I decided to include it. I recently had some work done to replace the original fuel lines from the tank to the engine that had started to leak. Car was running perfectly when I picked it up. After sitting again for ~3 weeks, I got a chance to drive it again, but started experiencing problems where the engine would occasionally sputter under load, almost like bad gas. I put in some Techron fuel cleaner, Marvel Mystery oil, and a few gallons of fresh gas.

I let the car idle outside for ~30 mins while occasionally pushing the accelerator and revving it up. When it seemed like the car was running fine, I drove it into the garage where it promptly died. I tried to restart it, but it seemed like I completely lost power as I could not hear the fuel pump when I tried to restart it. I pulled the fuel relays, checked pin 30 for power, and found there was no power. After several frustrating attempts to diagnose the issue, I slammed the door, and found the power come back (key was still in ignition in the on position). I lost power again, but I was able to recreate the issue, getting power back after slamming the door.

I suspect something is loose or a problem with the ignition. Maybe a loose ground? Any pointers and help would be greatly appreciated.

TIA