I have a 96 Suburban 7.4. I was driving a month ago and stopped at the light. When I pushed the gas it lunged and quit. I have changed the timing chain and gears, Plugs, Wires, Cap, Rotor, Cam Sensor, Crank Sensor, Fuel Filter, Fuel Pump and have no change. It acts like it wants to start but it will not fire. I have 56 psi at the plenum with the new pump. I am not getting any codes when a plug it into a code reader. Any suggestions as I am stumped.

 

Check the fuel pressure regulator. It worked for me and then I had to change a slew of other issues I was facing but the car was at least running. I know some people dont like to use Quik-Start on their engines but try it and see it the car continues to run or dies down. Change the FPR out and the truck should start if there are no other problems that you have to deal with.

I believe the diaphragm in the regulator goes bad. Check that and post back. I had a someone inform me that the pressure that you may be currently getting is from the new pump and the regulator is probably the culprit.