1995 blazer 4.3 votec

my blazer burnt out the coil, i replaced it and it burned out 4 more. i replaced the computer and flashed it, timing chain, complete distributor, control module fuel pump and wiring to fuel pump, fuel filter, water pump, my truck will run for a while and when i turn it off it wont turn on. if i check for spark the spark will ground the engine and it will turn on.
now that doesnt work. my truck wont start it cranks ok theres fuel but no dice need serious help. sos somebody please tell me something

Have someone check your CFI unit thats your central fuel injection i had a similar problem maybe have it checked!

Check all your grounds. Chasis grounds, engine grounds and computer grounds. Make sure they are connected, tight and no corrosion. You should have grounds on your fenders, frame, engine and inside the cab behind the side kick panels.