1991 pontiac sunbird 3.1 v6

its in the tank,access through trunk

What motor? Fuse is located in a different place on the 4cyl. vs. the V6. The four cylinder fuse is in the fuse box under the dash. The V6 engine the fuse is in a in line fuse holder next to the fuel pump relay under the hood, diverside rear at the firewall, there may be a plastic cover on the relay and fuse.

You have to check voltage at the fuel tank pump
Usually is a corroded wire between the fuel pump relay and the pump or the fuel pump relay defect.
You need to check with voltmeter and the feedback at PCM (Powertrain control module).
Hope it helps.

Sounds as though the fuel pump is worn out.

Thi is a fuel pump issue.

Could be a bad Throttle position sensor, and starter solenoid.

Check your fuel pump relay

You have a wire shorted to ground. Pull it back down and check all the wires.

fuel pump and while your at it i highly recommend replacing the fuel filter.

It sounds like it's not getting enough fuel to the engine if it stalls when you let up off the gas pedal but stays running with your foot on the gas it sounds like you need a new fuel pump and or fuel filter for the car.I can almost garantee thats part of the problem