It's a 1991 deville,the fuel pump is not pumping fuel, all fuses are good, sat for awhile, runs if you dump fuel in intake, 30 seconds

Fuel is probably stale. Pump or pump relay might be stuck.

I suggest you check the fuel delivery to the fuel rail. If no delivery the pump isn't working and the supply should be checked and then take the appropriate action depending whether the supply is good or not.

I had a 1997 s10 4*4 with the 2.8 v6.
mine do that I had to pull the gas tank replace fuel filter plus had to take undo the line from the intake and blow air thru it. Make sure all u're filter are replaced and y u have the tank down replace the fuel pump. I hope this helps u

Dump a little gas in the intake and if it runs for a few seconds then it prob your pump

did you replace the fuel filter as well? and check the fuel pump fuse and relay.

CAn you hear the fuel pump come on when you turn the key to the on position before cranking it?
It should run for 3 seconds then turn off. It will sond like an insect buzzing in your tank. That would be the first thing to check. If it is not running you will not get fuel to the engine. There is a fuel pump fuse in the panel that I would look at if no sound from the pump. There is also a fuel pump relay usually on the firewall up near the brake booster that you can check if the fuse is good. It will make a click sound when it shuts off after the 3 second mark. If all of the above passes, check for power at the relay with a test light and hope it is not the pump. The fuel tank has to be dropped to change out the pump. I get them from Ebay for 20 bucks and they have worked great.
Hope this helps

More often than not it is the fuel pump, especially with sitting for a couple years, hopefully empty if not try and get out as much of the old gas as possible when you replace the pump.

If it starts with gas down carb, then pump, pump relay, is faulty, or plugged fuel filter. Or carb floats sticking.

two things you can check . look in the trunk on the passenger rear side behind the carpet there is a fuel pump shut off switch make sure the harness wasn't bumped , also there is a fuel pump relay that might be getting hot under the hood near the Fuses on the inner finder well . Good luck

Have you checked the fuel pump relay with an ohmmeter/multi-tester? You will have to follow the power lines to find it. I would check the relay first. Then check fuel rail fuel pressure. It may be faulty fuel pressure regulator or a sensor. Is your check engine light on? If so, I would have the codes read to pinpoint exact problem location. Check your spark to make sure each plug is firing.

If you want more info let me know.

Your ECU is what acctivates your fuel pump realy. Put the key on the run possition and pull the ecu fuse for a few seconds and reinstall it ans it should accivate your realy for 5 seconds, Good luck.