engine runs good in neutral sputters climbing a hill in 2 and 3rd

has new plugs ,plugwires fuelpump fuelfilter oxygen sensor control modual .youcan rev the engine andit runs good in neutral climbs hill good in 1st gear once you hit 2 or 3rd it sputters bad and misses

Blazer 4.3L ????? Pickup 2.2L or 4.3L?????

2.2 s10 pickup

Engine trouble codes?

auto zone said they cant put a computer on a 1994 just 1996 an abuve

See a repair shop that has a real scanner!