Hello I have a 96 GMC Sierra 350 engine. For some reason when the engine gets warm it starts cutting out like its having a fuel problem. I have changed the fuel pump, fuel filter, fuel pump relay, and installed a new ground to the gas tank, but it is still doing it. It will start and run great in the morning but as soon as the engine is warm it starts bucking and cutting out, does anyone have any ideas as to what else it could be? Thank You

 

Check all of your spark plug wires, sounds like you have cracked insulation on the wires. That when heated, expand and you lose the spark to ground

 

Thank you, actually it ended up being a bad plug, which we had not really thought about since they were new lol