rear o2 delete?
This is a discussion on rear o2 delete? within the Computer & Tuning forums, part of the LSx Technical Help Section category; Originally Posted by Black 98 formula ws6 How can you remove your o2 sensor? Ive never heard of just geting ...
11-06-2008, 05:54 PM #21
your rear o2s tell the computer wether the cats are working properly (good cats produce oxygen and make the rear o2s read rich/ lean changes slower)
when you delete your rear o2s, all you are doing is telling the computer to ignore their readings and not to report a problem.
its just a way to trick the computer into thinking everthing is working right
11-06-2008, 05:59 PM #22
11-08-2008, 07:22 PM #23
With that cam and high LTFTs, you are NOT LEAN; you are drowning and your wideband can't show you because it's reading is being ruined by cam overlap. The fresh air escaping at idle from overlap shows up as falsely lean to both your wideband and your narrow band O2s and causes over fueling as it tries to correct for a perceived lean condition.
There are tuning workarounds of course... Depending on your year you can use PE enable down low commanding 1.0 so you get open loop idle, but first, I'd disable LTFTs (run STFTs only) and dial in the VE. The STFTs will still begin to wander rich after a while idling, but won't start with that 25% offset from an incorrectly learned fuel trim.
Or you could be a badass and run full time OL.
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