O2 Sensors - Pontiac GTO Forum
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post #1 of 5 (permalink) Old 02-10-2013, 04:39 PM Thread Starter
 
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O2 Sensors

I bought my 04 GTO about a month and a half ago and it had Kooks LTs, Kooks catless mids, and a Magnaflow muffler. It still has the front O2s in, but the rears aren't there. It does have a CEL for them, but it runs great and I still get 24+ MPG.

My question is, is it necessary to have the rear O2s at all since I have no E-check in my county? Will it affect performance at all? I've heard of newer cars running really badly without even 1 of their sensors, but this one is running great. I've heard of dummy sensors, spark plug fouler trick, and getting the CEL tuned out. What's best?
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post #2 of 5 (permalink) Old 02-11-2013, 10:18 AM
 
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Will not affect performance or hurt anything as they are just reactive and don't give input to control the air/fuel ratios. I just clear the codes through the Torque app on my phone until I can get my car tuned to turn them off (best option, btw). Another option is the 90* O2 "adapters" from ebay that will fool the ECM.

Current: MGW-p, H-pipe, SS OTRCAI, Lovell rear springs, Eliminator shocks and Pioneer AVH-P3300BT, JBA LTs+catless mids, Drilled/Slotted rotors, Kooks Afterburners, catch can & Tune Next: ??? Wish list: Intake & TB, modest cam, UDP, gears
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post #3 of 5 (permalink) Old 02-11-2013, 11:10 AM Thread Starter
 
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Thank you. How's that app work?
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post #4 of 5 (permalink) Old 02-11-2013, 11:47 AM
 
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App connects to a bluetooth OBDII interface ($24 on Amazon) to the car. Gives you logging capabilities and full paid version will let you clear codes. Works on android phone. May have an iphone version, don't know.



Current: MGW-p, H-pipe, SS OTRCAI, Lovell rear springs, Eliminator shocks and Pioneer AVH-P3300BT, JBA LTs+catless mids, Drilled/Slotted rotors, Kooks Afterburners, catch can & Tune Next: ??? Wish list: Intake & TB, modest cam, UDP, gears
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post #5 of 5 (permalink) Old 02-11-2013, 11:55 AM Thread Starter
 
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Wow, that's pretty friggin sweet. I think I'll get that for myself.
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