Engine Performance problem
1996 GMC C1500 V8 Four Wheel Drive Automatic 254000 miles
----------------------------------------------------------------
96 350VORTEC RUNS GOOD 5-10MI. THEN STARTS MISSING. WILL ACCELERATE SLOWLY BUT IF U FLOOR IT ,IT WONT REV PAST 2200 RPMS JUST POPS&MISSES GOT NEW PLUGS,WIRES,CAP,BUTTON,CHANGED BANK 1&2 SENSOR#1,CHECKED COIL . ERASED CODES RAN AGAIN SAME CODES POPPED UP WHERE DO I GO FROM HERE?