Welcome! My name is XXXXX XXXXX I will do my best to assist you with this problem.Ask me about added features such as phone contact anytime if you wish !
im sorry your having this problem
if its started with the ignition key in the truck will it still act like this ?
when it will not start how do you get the van to start up
is this a 1/2 ton ?
what size engine is in the van ?
ok Jim the most common problem causing exactly what your van is doing is the fuel system loosing its prime
this can be caused by a bad fuel pressure regulator on the injection unit under the black upper intake manifold to the most common the one way check valve built into the fuel pump is allowing fuel pressure to run back through the pump loosing the prime
which keying it on and off will sometimes build up enough pressure for it to run
your best bet is to have a fuel pressure gauge connected to the test port on the engine and key ON engine OFF see what the pressure is it should be 60 to 66 PSI and the needle should hold and NOT drop down
the odds are the pressure will drop down to 0 very fast which shows fuel pressure is your problem then the fuel pressure gauge should be connected to the fuel line from the fuel tank into the fuel filter and just connect that fuel line right into the gauge
key ON engine OFF test again if the PSI still drops the fuel pump is bad if the PSI holds within spec then the fuel bleed off is the regulator or the injection assembly
which replacing the injection assembly would fix this problem
and of course if the fuel PSI is holding but below 60 PSI key on engine off the fuel pump is bad
the fuel pump is basic the fuel tank needs to be removed and the fuel tank module/fuel pump assembly needs to be changed
print this out or save it to your computer ASAP as the pictures time out quickly in here
# XXXXX is the regulator