Car will not run unless gas in carb

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.

Throttle body or carburetor ?

Clogged fuel line?

Make and Model, year of vehicle?
I'm assuming the vehicle won't run unless you pour gas into the intake. If the vehicle will start and run while manually feeding gas to the engine, you can rule out spark and timing issues. Usual suspects in fuel system are dead fuel pump (electrical or mechanical?) clogged delivery system ( fuel line, filter, injector or jet) or intake leak (bad gasket or seal, vacuum leak, stuck valve).

It most likely is your fuel pump.But first I would check the fuel filter if it is completly clogged and not letting fuel get through it could be that.Your fuel pump has an electric motor,when you turn your key you should hear a motor go on.

It is most Likely your fuel pump, or possibly a clogged fuel filter. I had the same problem on my grand am, put in a new pump and that solved it.

It is your fuel pump or fuel filter. When you turn your key on, you should hear a buzzing sound for a second or two. If you don't hear it, thats what it probably is. If you have a fuel pump relay or fuse, check that first. If the pump kicks on, check the filter. One of these is your solution my friend.

If the car has a carb (not fuel injected) try removing the air filter cover and pouring a small amount of gas down the carb . Now try and start it aND see if it will start. If it starts and runs for a 10-30 seconds and then dies, it is a fuel delivery problem. Car should start if you add gas unless the car is being flooded out. I can't really help you with a fuel injection system except to suggest to replace the fuel filter and see what happens. Just remember you need spark, fuel and air to make combustion. YOu say the car fires so you have spark. I would focus on the fuel delivery.

Check the fuel pump.
Check the fuel filter.
Best would be to also clean the carburator.

I hate too tell you this But, It IS The Fuel Pump if you can Start it By pouring Fuel into the Bowl. Please Rate my response, I need all the help that I can get! Thanks!