Will start and run for 60 sec. or so then seems to run out of gas if you pump the gas it seems to try to stay running Ive changed the pump in tank and can hear that pump as well as pump on frame are running also changed filter and relay
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Is it electric or mechanical pump? Electric is with fuel injection. If its fuel injection, you should hear the pump run when you turn ignition switch. If u don't hear it, try starting, if no, turn off then on. It will self prime. Carburetor is with mechanical pump. I usually put few drops of gas in the carb. Start it, if no, more in carb till it stays running.
Most newer cars are very sensitive to being ran low on gas. The fuel pump is in the tank and relies on fuel to cool it down. Your fuel pump is now probably not pumping the required pressure for the fuel injection system to work properly (or at all).
Could be a small amount of rust got into fuel filter from sitting empty, try changing fuel filter before worrying about the fuel pump.Filters could be partly plugged and its always smart to start with the cheaper fixes first.
running fuel injected cars out of fuel bring premature death to the fuel pumps because of they locations ,in the fuel tank the fuel actualy keeps the electric fuel pump cool if the tank is ran below 1/4 tank to many times it damage the pump by overheating it .make sure your fuel pressurer is good at least 60 psi min for some ,
it is either your injection systems master relay or the fuel pump, you better hope its just the relay cause the relay is a $30 and about 12 seconds to change, the fuel pump requires you to get the vehicle up in the air, drop the tank, remove the pump assembly, replace it and put it all back together, its about a 3 hour job if nothing goes wrong and a pump can run you up to $350 just for parts. to check the relay, simply remove it and take a ohmmeter to it to check for completed circuit, there should be a crude circuit diagram right on the relay itself.
Is the pressure in the fuel system not holding? Fuel pump may be failing or the filter may be bad. Sounds like you're pumping the fuel system back up to pressure before the truck will start. Like when a fuel-injected car runs outta gas and you have to prime the system before it'll start again.
There is a check valve in the fuel pump that sounds like it may have gone bad. Check the fuel pressure at the shredder valve, there should be 60 to 65psi during the prime and will drop 5 psi when the engine is running. Once the fuel line is primed, check to see how fast you lose your prime. Since you replaced your injection system, we can eliminate the fuel pressure regulator leaking which was common on the injection system your truck run's on. If the fuel pressure drops fast then it's going to be a bad check valve at the fuel pump and it may be time to replace the fuel pump it self. Good luck and hope this helps. Note: do not try to start the engine with putting gas through the throttle body, it's been know for small fires to start and burn the spider injectors.
check the fuel filter and the pressure regulator to make sure you are getting the proper amount of fuel to the injectors. best done with a pressure tester hooked to the port on the fuel rail should read around 30 psi
The fuel pressure should be 60 to 65psi in your system with the engine not running and fuel line primed, (ignition key's to the run position). Once engine is running the fuel pressure should drop by 5psi, change the fuel filter and recheck the fuel pressure at the shredder valve. it's known for the fuel pump to fail when the gas tank runs low or out of gas, the pump will end up burning it self out since the gas is what keeps the electric fuel pump cooled. The other thing to is putting gas through the top of the throttle body to start the engine on the SEFI is a NO NO, well a BIG NO NO. it's been know for the gas in the intake to catch fire and burn up the poppet valve in the injection system causing the replacement of the fuel injection system. Keep me posted and good luck, be gald to help you get your truck running again for the july 4th. OH and it was not mentioned but did the fuel filter get replaced???