My car wont start, i can put gas in the carb, and then it will start, but after the gas runs out it cutts off.

Possible vacuum leak, or carb float valve is stuck or misadjusted.

try a couple of shots of Ether to get the Air out of the Line between CARB and Tank, seen it a few times also it will clean out the Jet in the Carb , put some Injector Cleaner in the tank to get rid of Varnish IN the Carb should take a few tries but within Half hour should run like New

carb is sitting to close to hot intake manifold, need phenolic or some type of spacer ,, fuel starts perculating when vehicle shut off perc.s out of vent tube causes it to flood ,then when you do get it started its rich so you stomp on the gas and blow your power valve out try letting it clear out a bit before accelerating , if it backfires replace power valve

possible float sticking in carb or fuel pump not working. can you see gas spray in carb when manually operating throttle? Does it backfire when running? if so it may have jumped time,

is this a carb model or a injection and what year and model would be of a help

if it is fuel inj. check for good fuel pressure. maybe fuel pump in gas tank.

This truck is fuel injected, the problem sounds like a weak fuelpump, it runs when you pour gas into it until that gas runs out, the first thing is to test the fuel preasure, if the pump is weak it may run with gas poured into it but wont idle, also a common problem is the coolant temp sensor and the ground wires to thermostat housing bolt but i wont bet its the pump inside the fuel tank, if you put a fuel gauge on it there should be at least 55-61 psi if its a few pounds lower it can cause problems, you have everything else and it runs with gas poured so its a fuel problem check the preasure, theres a valve up top on the fuel line to connect a fuel gauge to it, start there hope this is helpful.

take your distributor cap off and check the ignition module for loose wires or even a ground strap thats connected to the engine to the body , you can take the module to autozone and have it checked for free, it might have a crank position sensor thats going wacky

sounds like you need to rebuild your carb. I just had mine done for my jeep the hardest part was finding someone to do it. ps mine only cost 50 bucks so dont get ripped off. good luck and hope this helps.

check the fuel pressure could be the regulator or pump or....