Fuel Pumps Not Kicking On

[1990e30coupe]

Hi,
So I have been searching on this site trying to find some ideas on where to start searching for my issue and I haven't come up with much as everything that pops up in my searches are intermittent running or poorly running pertaining to fuel pumps.
I have a 1985 318i that was a shell when i got it. The body was nice so i found a motor did a complete rebuild and pieced the car back to life over the past year. The issue I am having is that the fuel pumps will not kick on at all. I have tested for power at relay everything checked out, and put a new relay in just for the hell of it. If I Jumper at the relay I can get the fuel pumps to run and the car runs great. So the computer sends signal to that relay according to my Bentley, but is there a signal for the pumps to that relay from something else or am I focusing on the wrong area? I can jumper the pumps at the ignition but want to fix it right. Any ideas or leads on what to look for would be greatly appreciated.

Also I am not finding a specific relay for the fuel pumps as they just run off the main relay that sends signal to the AFM, TPS, and Fuel Pumps. I don't have an O2 sensor in yet but i don't think that would cause this issue. I am not that great with wiring; therefore, before I start getting into that being an issue I thought I would come here first and see if i could get some ideas before searching myself.

[Sunnyledge]

On another website, Richardodn posted a google doc ( https://docs.google.com/spreadsheets...it?usp=sharing) that he compiled for diagnosing many E30 issues, including the fuel pump. Excellent.

[Gregs///M]

Crankshaft Position Sensor CPS, is the sensor that sends signal to the DME, which in turn will trigger on the fuel pump. Replace your CPS and I bet your fuel pump will work again.

[1990e30coupe]

On another website, Richardodn posted a google doc ( https://docs.google.com/spreadsheets...it?usp=sharing) that he compiled for diagnosing many E30 issues, including the fuel pump. Excellent.

Thank you as that's exactly what i was looking for. Much appreciated.

[1990e30coupe]

Crankshaft Position Sensor CPS, is the sensor that sends signal to the DME, which in turn will trigger on the fuel pump. Replace your CPS and I bet your fuel pump will work again.

There is no CPS on these older M10s that i know of unless in the distributor, but even then unlikely. Maybe a signal from the speed sensor. I would think there has to be a crank or cam signal from somewhere, but then again i am not too familiar with these M10s.