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Old 09-17-2014, 12:20 PM   #1

Superfly1's Avatar
Drives: 2010 Camaro 2LT #2197
Join Date: Nov 2009
Location: Wichita, KS
Posts: 804
Wideband O2 Location

I have a 2010 LLT with OBX LT headers and no cats. There are resonators between the front & rear O2 ports that came with the headers. I have disabled the two rear O2 sensors from throwing codes through my Trifecta tune. I am looking on adding a wideband O2 sensor to the car soon & had a couple questions.

1) With it turned off does the ECM still use data from the rear O2 sensors?

2) Would it be OK to replace one of the rear O2 sensors with a wideband O2 and tie up the factory wire?

3) Is is OK to put the wideband sensor behind the resonator or should it be up near the front one?

Just wanted to see if this was a viable option or if I need to just pull the header and have e a bung welded in. Thanks in advance for any input.

CAI intake | OBX LT Headers | Flowmaster AT Exhaust | Trifecta Tune | SS Rear Diff, Axles & Driveshaft
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Old 09-17-2014, 11:08 PM   #2

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Drives: 2012 SIM 2SS/RS
Join Date: Jun 2013
Location: Attica, NY
Posts: 2,359
it should be as close to the collector as possible. The rear o2s are off with the tune. You could remove the rear o2s and plug the holes. you have to put the wide band between 10 and 2 o'clock when looking at the header so water does not ruin it. I wouldnt put it in place of a rear o2.
2012 2SS/RS M6 SIM, Painted Carbon Flash rally stripes, Elite CC, 3.91 gears, New Era ported TB, OTR, and Dyno Tune, Heritage Grill, Pat G Cam Motion cam, 25%Fluidampr, Melling 296 Oil pump, Katech C5-R chain, Cloyes LS2 HD tensioner, PAC 1205x springs and Comp Cams trunions. ARH 1 7/8" LT headers w/cats, TWM full Shifter, BMR sways, trailing arms, toe rods, delrin cradle bushings, BK039 rear control bushings, front bushings. Solo Mach-XL exhaust
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