My taurus will not crank unless i pour gas into the air intake then it shuts off 2 seconds later the fuel pump is working what could my problem be

Hi Clyde:
Since you mention "gas rail" I'm assuming fuel injected.
I'd check the fuel pressure in the rail. Should be around 40 PSI.
If pressure is OK then injectors not working. Time to check cps.
You know the spark side is OK since it will run.

Sounds like a fuel pump issue. Check the pressure from the fuel pump.

First, lets be clear with terms. To crank is to turn the engine over, you can do this manually with a wrench on many vehicles. It requires no spark or air. To turn over or to fire is when you achieve combustion. Example: You could pull the spark plugs on a vehicle and turn the key and it would crank, but it wouldn't fire or turn over.

Now it sounds to me like your vehicle is cranking but not firing unless you pour gas in it. My first thoughts are fuel system. I'm assuming it can't be fuel pump because it runs once it fires. Perhaps the fuel pump isn't priming itself, or perhaps somehow air is getting in the line between the injector and fuel pump? Test the fuel pump first by turning the car from off to on (not starting, just on). You will usually hear a short buzzing noise coming from the engine bay that stops shortly afterwards, that's your fuel pump pressurizing the line. (Pro Tip: If you ever try to take your key from off to straight to start and the vehicle doesn't start on the first try, but does the second time no problem, try delaying at on for a moment before trying to start. This gives your fuel pump time to pressurize the line.) Assuming your fuel pump is charging the line, the next place to look would be at the path the fuel takes to the throttle body. When you crank it over and it doesn't start, are you getting any fuel? If you can't see where the fuel enters the system try smelling the exhaust while cranking without it firing, if it smells of fuel you're good and need to look at air flow and spark, if not it's a fuel issue.

Past that, I'll leave it to someone more experienced than myself, but that would be how I troubleshot my own vehicle.

"the pressure is good" doenst tell anything, if it isnt at least 60psi, its not enough to open the injectors. Its time to have a shop look at it, the rich o2 sensors may be because gas is poured in. Scan data needs to be checked while engine is off, cranking and running to diagnose the problem.

when u run the gas tank empty it severly overheats the electric fuel pump inside the gas tank, this tiny pump depends solely on the fuel flowing around and through it to lubricate and cool it so it won't overheat, you have seized up the fuel pump, u can let it cool for an hour and make sure the pump is totaly immersed in fuel before retrying that means u must put in at least 5 gallons of gas.

Yes...check the pump, filter and output. Also check the ballast resistor for the pump. Stop pouring fuel into the cylinder...instead, use carb cleaner and spray into throttle body (excess fuel in one cyl will contaminate your engine oil). If it runs normally after you get it started likely the pump is good (unless you have problems at high rpm's under power) Regulator is likely good as well...default is to more fuel not less.

Have your fuel pressure checked.Sounds like pump or relay is out or fuel filter restricted too much.Remove the gas cap and put your ear to filler neck while someone turn's the key on,you should hear the pump running.pump run's for about 8 second's to prime fuel rail then shut's off till cranking.

Yep fuel pump put a filter with it for peace of mind. Pump is in the tank drop tank remove round access hole replace pump go to town. gl dc

check out the injectors and the coil pack to make sure you are getting spark

Check fuel filter.