1990 gmc sierra k1500 5.7 350
My 1990 gmc sierra k1500 5.7 350 will crank and
idle great and Rev fine and you can put it in gear
and drive it somewhat fine but occasionally it
sputters and cuts off and when you mat the gas
pedal to the floor it tries to die out and I have
already replaced the egr, iac, distributor, rotor head,
spark plugs and spark plug wires, map sensor,
alternator, and I have cleaned the throttle body and
put all new gaskets in and I have checked it over
and over for vacuum leaks but the problem still
continues, any ideas of what it could be