OldStyleMechanic

I am an old style mechanic,  before all the electronics,  could use some advice on 2000 Bonneville.  New to the forum and dont know my around the site,  please help. 

I've got a heck of a problem.  Here goes: 2000 Bonneville Stalls,  Cuts back, shuts down while driving,  acts as if not getting gas,  things I have done: Had head and intake gaskets done done by reputable mechanic and one valve replaced, new plugs, lifetime wires, coils, crank and cam sensors ( lifetime warranties ) had ICM checked at autozone 7 times back to back,  test came out ok,  cleaned and greased bottom ICM plate,  cleaned and greased connector harness and coil heads.  New fuel pump and filter.  Unplugged MAF and TPS Got codes so,  they were reading,  only code that appears is #1 cylinder missfire but not constant,  car is still doing same thing,  PLEASE HELP.