bufmatmuslepants

iTrader: (3)

Do ac Delco O2s if its not too late, Bosch are hit or miss. That being said I'm on 5 year old Bosch sensors now no issues.

BoostedDSM

iTrader: (6)

I have one out of my parts car that is almost brand new that i'm going to use till I can order 2 new ACDelco's from amazon, they are like 31 each so it's not bad at all.

06camarodude

Bingo. Leaded gas and O2 sensors are mortal enemies. Replace the plugs, replace the O2's, and keep an eye out for codes. Don't do that again, unless the car is tuned for higher octane fuel, you are just wasting your money. Premium Unleaded is where it's at, you won't destroy O2's, foul out plugs, or cause driveability issues. Given how much of a PITA plugs are to change on the LT1, I'd want to try and keep a set of plugs in there as long as I could.

BoostedDSM

iTrader: (6)

Plugs are good, pulled those out the other day, and the only code I had was for the right o2 which if my extensions show up today gets replaced. Only other codes were stuff I knew about already, AIR/EGR/EVAP.

BoostedDSM

iTrader: (6)

Swapped out both o2's with Racetronix extensions, fixed my issue with the misfire, now the only problem I have left is the car feels like it falls on it's face in the higher rpms, mainly top of 3rd around 4600 plus. I'm suspecting my cheap Duralast plug wires, as my Opti and coil have maybe 5k on them now. But so far it's getting decent mileage on the highway for not having a tune.