2000 mc ss o2 code

the service engine light is on only thing it is showing when i have codes pulled up is o2 bank 1 sensor1 .replaced with new one same code is coming up checked wiring everything is good
car idels fine
take off as soon as you reach 2200 rpms its acts like you let off the gas you have to feather the gas to get up to speed and it does not do it all the time 3.8 s11