Rear o2 Delete vs Gas mileage

Reply Subscribe

Thread Tools

Search this Thread

Apr 21, 2008 | 11:09 AM

#11

fastnblu

Thread Starter

TECH Senior Member

iTrader: (2)

Joined: Mar 2008

Posts: 5,718

Likes: 1

Quote:

Originally Posted by kbracing96

Bank 1 is drivers side, bank 2 is pass. Sensor 1 is the front, sensor 2 is the rear. Set anything for sensor 2 to not report, no MIL and uncheck the SES button. Should be about 8 things I think.

The heated sensors are so they will warm up and respond faster, not to light the cats off faster.

KB, thanks for catching that. I was extremely tired when I typed that. I just reread his & mine. Oops.

As in 8 possible causes?

Maybe I worded about heated o2 poorly. Faster warm up & response sounds better. But isn't the byproduct of a quicker warmup/ response, that cats light off faster?

Or no, it just allows it to go into closed loop quicker? And if something goes closed loop, does that guarantee better mileage?
Please correct me on any misunderstanding I may have; I don't tune stuff on any regular basis, so how I word or interpret isn't the best. KB or anybody, set me straight.

Apr 21, 2008 | 12:41 PM

#12

kbracing96

TECH Senior Member

iTrader: (26)

Joined: Jul 2004

Posts: 9,485

Likes: 31

From: Oakland, OR

I meant there is 8 O2 codes to shut off for the rear O2's. They're heated so it can get into closed loop faster for the best emissions. Mileage is actually beater with open loop, lean mixture, but emissions aren't as good. Closed loop mileage will be good to.

Apr 21, 2008 | 02:57 PM

#13

fastnblu

Thread Starter

TECH Senior Member

iTrader: (2)

Joined: Mar 2008

Posts: 5,718

Likes: 1

Thanks for great explanation! I guess KB knows his stuff. Know any reason(s) what's possible causes? I took a few guesses in some of my previous posts. Thoughts, KB? Don't everyone jump at once.