If I remember correctly your fuel pump is controlled from a relay behind the battery. When first energized by the key it only pressures the rail for 2 seconds. If it does not get a engine running status tach signal it cuts off the power to the fuel pump. Something else that escapes me is also in that relay. I recall they were fairly easy to test with jumpers I'm just not 100% certain which relay you have installed.

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92 e300d2.5t
01 e320
05 cdi
85 chev c10