Hi Guys,

94 530i Canadian car, second owner.
Starter turns well, slight fuel smell, pulled plugs - wet, spark and battery good, fuses good. CPS replaced, cam position sensor replaced. Replaced DME Relay, fuel pump relay, fuel pump works, battery was disconnected for a period, no codes present other than a stomp test that seems to indicate 1,1,1,1.
Compression good. DME replaced. Damn! Still won't start. Turns over well. Mass Air Flow sensor good.

Symptoms - Car was running well, no smoke, smooth, started it one day...ran, then stopped...tried to start it, wouldn't start...came back next day and started it. Wouldn't start after that.

Wiring Diagram indicates that pin 30 of the fuel pump relay wiring should be battery hot at all times...Mine is not. Suspect wiring diagram error, but it also makes sense that the wire should be hot because that is what turns the fuel pump on when required once the relay contact is made.

This of course would not have changed from the time between the car running and the car not starting, so I do believe the wiring in the car is correct, despite what the diagram says.

Any thoughts out there Guru(s)?

Thanks