96 dodge ram 1500 turns on then shuts off

87camaroguy

the truck starts then cuts off after about 5 seconds swapped with good pump but still no go please i need help this truck is my life blood with out it i will lose my job and then the rest of the **** will hit the fan.

livedodge

your posting is old but im gonna try any way. your problem sounds security related but there's not many security features on a 96 possible pcm