Chevrolet Repair: 92 Chevy Suburban 1500, fuel pressure regulator, chevy suburban

Question
I am trying to start my truck but it wont stay on after it on for at 5 min.Here is a list of things I have replaced coil,distributor cap & rotor,ignition module,map sensor,tps sensor,iac valve,fuel injectors,egr valve,egr solenoid,esc module,spark plugs,fuel pressure regulator.I changed the spark plugs 3 times because it fouls out the plugs with a lot of carbon and it smells like its not burning the fuel completely if you have any suggestions i would like to know if i am doing something wrong.

Answer
check your fuel pressure. youll have to get the pressure rating from your local dealership, im not sure what the pressure is for a throttle body injuected engine anymore. but, if its low, there is your problem. it seems thats the only thing you havent replaced on this thing, lol. well, that and the computer which would be my next step if the fuel pump were ok. good luck and let me know how it goes.