SS DNA

iTrader: (7)

Im installing headers and well there are 4 O2s and I got two extensions for im guessing the front ones. But what do I do with the rear O2s?????

Justin00SS

iTrader: (5)

Pull them off and tape up the wire ends. A tuner will be able to delete them. All they do is tell your computer that your cats are working.

SweeTbone

iTrader: (8)

Well, while on the topic of rear 02's, I just got my Kooks Catted Y today,and it had bungs for the rear 02s. After reading the "EGR - AIR - O2" sticky, is there really a point to hook them back up? Or should I just plug the bungs and have them tuned out? Will the stock rear sensors reach back to the Y with no extensions if I need to hook them back up? Since it looks like they will set a code even if I connect them, may as well not even bother ya know?

Justin00SS

iTrader: (5)

My tuner is telling me just to unplug my rear o2s and tape off the connections.

Like I said they don't do anything really besides tell the computer your cats are working. The front o2s are the important ones.

I'm installing my Pacesetter LTs this weekend and will have them tuned out by Sunday.

ShevrolayZ28

iTrader: (4)

I re-installed my rears. No extension was required. If they ever fail I will have the code deleted at that time. I figure I may as well keep them there in case I'm unlucky enough to run into a thorough inspector.

The fronts are my concern. A week after installing headers I'm getting the dreaded insuficient switching errors (p1133,p1153.)

...no codes from the rears though.

02SS0384

iTrader: (1)

I bought a couple of plugs for the rear bungs on my catted-Y at autozone. I think there were actually oil drain plugs, you can find the tread pattern using search. I also run O2 sims in the rear, not SES lights since.

SS DNA

iTrader: (7)

Speaking of the O2s, Should I replace the front ones with new ones ????

TheBlurLS1

iTrader: (8)

Are you getting a tune?

BTW - There's a sticky at the top of this page. I left it open so you can ask questions in it. After we answer your question, I'll add the info to the main body of the sticky.

SS DNA

iTrader: (7)

I would like to get a tune soon but no money

RrCoX22

iTrader: (6)

after getting the rear O2's tuned out w/ LT swap and then when it's time for a smog (which i plan on swapping my shorites and cats back on w/rear O2's) will I pass the tech's computer?

2K2WS6TA

iTrader: (2)

As long as the light isn't on and the code is set to SES enable- no error reported, you should be fine
I love computers, so easy to fool

SS DNA

iTrader: (7)

Hey guys should I replace the O2s ???

Mine looked preatty black.

TheBlurLS1

iTrader: (8)

That's because they have alot of exhaust gas/carbon flowing by them at an incredible rate. Mine have 120k miles on them and still work perfect, but look like charcoal.