This is a common malfunction that happens when the vehicle gas tank runs out of fuel.
Perhaps there is an insufficient gas level in the tank?
You need a new fuel pump
at the beginning it will be cold, but it will warm up as you start driving
Check the fuel pressure regulator or the vaccum line to it If you have to have the gas peddle pushed all the way to the floor to start it that is a for sure sign
You will need to remove your oil pressure sending unit and install a mechanical gauge to get a true reading. You need to start out cold and write down the pressure reading and also once it warms up to operating temperature. If the pressure gauge is not the same as the mechanical one you have a bad pressure switch.
Take the wire loose from the oil sending unit and then turn the key on and ground the wire to the engine somewhere and the gauge in the truck should go all the way past the highest point. If it don't then the gauge in the dash is bad are the wire going to it ( The 1 you grounded ) is broken. If the gauge is reading low oil pressure, Then unscreew the oil sending unit on the engine just behind the distributor, were you took the wire loose from. Then install a OIL PRESSURE GAUGE into it's place. Then start the engine and read the pressure, Now compare the reading on the dash gauge to what you are reading on the oil gauge.
fuel pump in tank along with sending unit bad
Connect a freon gauge and can to the low side AC port. Start the car and turn the AC on high. Open the freon valve and fill the system to full on the gauge reading.
Using a gauge and the proper type of freon, connect to the low side ac port. Start the engine and turn the ac on high. Allow freon to flow to show a full reading on the gauge.
Low battery and when attempting to start car ran battery further down. Date and time went to default settings and fuel gauge registered empty. Charged battery. Fuel gauge still showing nothing. Picked up answer from Audiworld post. Removed fuse 15 (instrument cluster) & 28 (fuel pump), turned on ignition or to start the car - might not start, but mine did), put fuses back in. Fuel gauge now correct.
weak oil pump, worn crank shaft bearing, or a bad oil pressure gauge all these can be contributing factors. Best place to start is with the pressure gauge.
You fuel float my have a hole in it or be fuel logged.Replacement is advised.