1986 325i Sport problems

[swin]

I have a 86 E30 325 sport that will not start and i have it narrowed down to a fuel issue. It was in storage and has not been started in 10 years. There was a cobra alarm in it that I have now removed. The fuel pump was stuck but i managed to free it out but it spins but doesn't pump so waiting on a replacement but it still spins when power applied to relay.
-There is power to the coil and spark,
-There is power at fuel pump relay but the switched negative from the ecu is not present
-If i put a ground to the relay the pump cuts in.
-If i take off the ECU plug and ground pin 3 going to the pump relay the pump also cuts in.

I have it down to the ECU not giving the (-ve) output but am wondering would you have any other ideas as there is a sticker on the ECU saying it was repaired/rebuilt by some company before. I am wondering am i missing an input to the ECU which in turn is not telling the ecu to produce the ground to the Pump relay?

Thanks in advance,

[Gavt]

Do you mean its not priming before cranking as this normal. It pumps when the engine is turning.

[swin]

No its not pumping at all unless the relay is grounded or crossed there is no negative feed from pin 3 of ECU to the relay at any time but if pin 3 at the ecu is supplied with a ground the pump runs.