SILVERTA8702

i have a 87 ls1 6 speed im currently running the stock intank with hypertech inline , my car in 1st gear has all the power it should then when i hit 2 and 3 it bogs right down and stumbles like its out of fuel , the only code i have is bank 2 sensor 1 o2 sensor mis communication, now i know its a major factor but dose it affect the performance that much ?

staringback05

iTrader: (8)

is this your rear o2 or your front?....the rear at most would make it run rich, the front could influence how the car runs alot more without going into stuff