i have a 91 305 tbi. i have no power to my fuel pump. i replaced the fuel relay switch and i still have spark to the plugs. any hints?

Check the Fuel pump fuse and also your connection to the pump at the connector near the tank.

fuse is good, so is the connection at the tank. where exactly does the power come from before it hits the relay switch? from the starter solenoid or some other connection i dont know about?

Use a spare battery or starter unit, or run a lonf wire, to the power feed on the pump.

it will either click and then do nothing ....replace it (i think these run all the time with a bypass up front??)
or
Do nothing. ...replace
or click then run, u will be able to feel it vibrating or hear it running....check ciruits.