US_Army_Z28

iTrader: (3)

So my check enginge light came on so i checked to see what threw the code and its the o2 sensors have gone bad. Could this cause a low and rough idle while stopped or under initial acceleration from a stop? Only happens within the first 20-30 minutes of driving then stops doing it and runs normal. Any ideas?

BIG_MIKE2005

iTrader: (116)

Could be a number of things. Are you getting any O2 codes or any codes at all? Could be a fuel pump on its way out, could be O2's failing, could be a MAF failing & so fourth.

I chased a stumbling problem for a couple weeks on mine. It would drive fine then mess up. I replaced O2's/plugs/wires/intake gaskets/MAF/fuel filter & finally after all that the pump started to whine so I tossed in a Racetronix pump. Car runs like a champ now especially with the other service items replaced, LOL.

US_Army_Z28

iTrader: (3)

Well the maf is brand new along with the rest of the motor. It only has 500 miles on the new motor and the only trouble codes im getting are from the o2 sensors

simplysix

iTrader: (1)

Could be 02s. For the $ it'd replace them anyway after putting in the new motor, on less thing to worry about