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How can you delete o2s?

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Old Nov 8, 2016 | 08:42 AM
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Default How can you delete o2s?

I know how: IE tune or bypass but why?

Doesnt the O2 provide closed loop operation? If you bypass or trick to 1.0, wont it be open loop/run lean etc?

I am coming from o2/maf 3rd gen where the o2 ruled the ECM thoughts lol. you could trick the MAF not the o2.
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Old Nov 8, 2016 | 12:59 PM
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From: Schiller Park, ILL Member: #317
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Rear O2s (post-cat, this would not be present on your 3rd gen) just monitor cat operation. They can be deleted without any ill side-effects to engine operation. Or are you talking about front O2s (pre-cat)?
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Old Nov 9, 2016 | 08:06 AM
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Ahh so there are 4, pre/post cats. Helps with emissions... Yeah I am ripping that crap out... LOL

So I can frost tune those out, along with VATS.
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Old Nov 10, 2016 | 12:58 AM
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Yes, you can delete all four O2 sensors by raising the closed loop threshold so it stays in full time open loop with some other modifications to the tune. I ran that way for a year and a half and have been running that way again for the past six months or so.

To do it right, you'll want to monitor your AFR with a wideband and then edit the fueling tables to provide a proper AFR curve.
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Old Nov 10, 2016 | 02:01 AM
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Actually, Jim, since your question isn't particular to Firebirds, it'll do better over here.
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Old Nov 10, 2016 | 09:39 AM
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remove them and set the SES codes for post cat function to NO MIL.
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Old Nov 10, 2016 | 11:46 AM
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Default EGO Box

MY method :

MY device, one I sell, "creates" the EGO output signal, then as BOOST, NOS, etc. is implemented, a signal of Lambda = 1.000 is sent to the EMS.

Thus when NORMAL EGO operation is of a benefit, "millage", etc. the
EGO operation is as seen in the exhaust.

Lance
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