1994 Transport Fuel Problem

1994 Pontiac Transport 3.8. Turn key on fuel pump does not go on. Crank car for 10 + seconds and car starts. If restarted within 5 min ok, longer than I have to crank it for at least 10 sec. before it starts. Took fuel pressure test and got a reading of less than 5 psi. Replaced fuel pump at gas tank and results are the same. Cannot hear fuel pump when key is turned on but after cranking for a while car starts. Tried testing pressure regulator but cant get pressure up without starting car. Anyone else have this prob.?

Fuel pump relay is broken. When you crank the engine long enough, fuel pump gets power through oil pressure sender, and engine starts. I dont't have books available right now to look where the relay is located. Hope this helps a little....

Bought Haynes Manual for Transport and it showed where pump relay was. Tested by connecting 12 volts to gray wire. Fuel pump came on so I changed relay and car works great. Thanks for your help