99 tarurus stop getting fuel.change fuel pump and fuel relay .check shout switch still no fuel can add air pressure to tank car will thin start but stops in 3 to 4 sconds

Many things can make it stop and not restart. Even though the gas gauge reads it may be false and the car could be out of gas. The gas tank could have water in it especially if you just got gas from a station. If you think that there is water in the tank add a bottle of "heat" or tank dryer to the tank. A bad fuel filter or low fuel pressure, bad ecm(computer), bad ignition module or ignition components(coil etc), bad fuel injectors, bad crankshaft position sensor, bad ignition switch, bad relay(s) or blown fuse(s), security system/ignition key, or bad connector(s)/wiring issues. The best place to start is checking the fuses and scanning the computer for codes.

What year and which engine ?

Could be a fuel pressure regulator or lost signal from crank sensor that gives inaccurate data.
The crank sensor is responsible for sending data to increase fuel pressure as a function of increased RPM. If the RPM reads low, then fuel pressure will be low.
Check fuel pressure.
Thinking that air pressure is affecting pressure regulator and compensating for a weak regulator diaphragm.
Would be interested in final fix of your problem.

Once the fuel tank was empty the fuel line has got air locked and so the fuel pump will neot work unless the air is bled out of the system.
So open the cap to the fuel tank and using the palm of your hand to cover the mouth of the fuel tank try to blown to pressurize the tank.
if this wont work the fuel line to the pump must be opened and the fuel bled out.
Now the fuel will flow to the pump and start the engine.
Never run the tank dry.

There is a fuel pump prime cycle (2 or 3 seconds)when you turn the key to on and once you start the engine the fuel pump power comes though the oil pressure switch.No oil pressure,no power to the pump.maybe your oil pressure switch has become weak?I would use a scan tool and command the fuel pump on when it does shut off,just to make sure the pump can run,as it could be a bad pump too.Also when it does quit,if you turn the key off for 10 seconds, you should get a prime cycle by turning the key to on.Have someone listen at the gas tank for a fuel pump noise,which will be only 2 or 3 seconds,but will do as a pump running check.Next would be to check for power at the back at or near the fuel pump,power and no pump.replace pump.No power to pump,follow power back to the front through oil pressure switch and fuel pump relay etc.You can always add your own power to the pump from a power source the switches off with the key if needed bypassing the existing wiring and oil pressure switch.

if your fuel pump and relay are new, how about your fuel filter, if your fuel pump is working but no fuel turns out, check fuel pump polarity, if ok, there will be a clogging in fuel lines, take a high pressure air and plug it to fuel outlet in fuel lines test port, allow air to go back up to fuel tank and observe if the air goes, if not, check or change fuel line, if the air goes to tank, direct your fuel relay pin 30 and 87 and check if the fuel runs to the injectors, if not, change a good fuel pump

Fill the tank to over 1/2 tank and add Chevron Techron fuel system cleaner

Do a fuel pressure test at the fuel rail.

The PSI should be 55-70 psi (or check the sticker under the hood)


Test fuel pump relay.

Check oil level and oil pressure. Low oil pressure,low oil pressure reading can stop the fuel pump from ran. It's a build in safety feature.

If it start and ran better the add only bottle of RED Iso-heat dry rule out water in fuel.


My bet is a weak fuel pump.

Fuel pump with over 110,000 miles will like to fail in a HOT day.


You are on the right track,

CHECK TO SEE IF YOU HERE THE FUEL PUMP START AFTER YOU TURN THE KEY ON. FUEL PUNP, FILTER, FULE PUMP RELAY.

check air flow duct where the throttle valve is . check the pvc valve . make sure it isnt stuck open. check the egr valve . it will stick open stall out motor .use a scanner it will tell you if you got egr valve problems. check fuel pressure. it could be stop up fuel filter bad fuel pump fuel pump relay.your car problem sound like a major vacuum leak . change spark plug and wires if they have not been change in a while. it could idle air control. hook a scanner .it could give you a code.

I change the fuel pressure regulator and fuel pump relay, now runs better.