Assistence with rear O2 delete?
07-31-2006, 10:39 AM
#1
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Assistence with rear O2 delete? Wondering if anynyone has done that and if anyone can help me with it.
I did a search many different ways and wasn't able to find anything in here about this.
I did a search many different ways and wasn't able to find anything in here about this.
07-31-2006, 11:07 AM
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This does depend on what else you have done. For instance, are the cats still installed?
In order to eliminate any codes from being tripped, go to the DTC section of the software and look for all codes dealing with Sensor 2 (i.e. the one after the cat) for both Bank1 and Bank2. Set these to No MIL. The primary function of the sensors is to monitor catalyst efficiency. Look for:
P0137, P0138, P0140, P0141, P0157, P0158, P0160, P0161
In order to eliminate any codes from being tripped, go to the DTC section of the software and look for all codes dealing with Sensor 2 (i.e. the one after the cat) for both Bank1 and Bank2. Set these to No MIL. The primary function of the sensors is to monitor catalyst efficiency. Look for:
P0137, P0138, P0140, P0141, P0157, P0158, P0160, P0161
07-31-2006, 11:19 AM
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Link isn't working...
Bought the car this way
Well no cats no pump and Borla Muffler.
Has O2 sims on but I think it would be easier to get rid of them all together.
Bought the car this way
Well no cats no pump and Borla Muffler.
Has O2 sims on but I think it would be easier to get rid of them all together.
07-31-2006, 12:37 PM
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Was the car tuned before you purchased it? There are other things you will want to change as a result of not having cats, air pump, etc. Particularly, those items have parameters with "On/Off" type switches so that they are no longer used/activated by the PCM. You will also want to change a few more DTC's to 'No Mil'. The link seems to work for me. I forgot P0420 and P0430 which are cat efficiency errors. There are several DTC's associated with the AIR system as well.
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07-31-2006, 09:03 PM
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Originally Posted by Eroc
So I thought it was actually removing the rear/lower O/2's from the PCM all together.
So its really just removing/disabeling the codes?
So its really just removing/disabeling the codes?
In order to maintain a reasonably low emissions of Hydrocarbons (HC),
Carbon Monoxide (CO), and Oxides of Nitrogen (NOx), the engine controls system
uses a three-way catalytic converter. The catalyst within the converter
promotes a chemical reaction which oxidizes the HC and CO present
in the exhaust gas. This reaction converts them into harmless water
vapor and Carbon Dioxide. The catalyst also reduces NOx, converting
it to Nitrogen. The PCM monitors this process using Bank 1 HO2S
#2. Bank 1 HO2S #2, located in the exhaust stream past the three-way
catalytic converter, produces an output signal which indicates the
oxygen storage capacity of the catalyst. This determines the catalysts
ability to convert exhaust emissions effectively. If the catalyst
is functioning correctly, the Bank 1 HO2S #2 signal will be far
less active than that produced by Bank 1 HO2S #1. This indicates
that the three-way catalytic converters oxygen storage capacity is below
a threshold considered acceptable.
If they were critical to closed loop fueling requirements like the front O2's, then it would be much more involved in getting rid of them (just like trying to turn off the MAF there are many more 'things' that need to be done). Carbon Monoxide (CO), and Oxides of Nitrogen (NOx), the engine controls system
uses a three-way catalytic converter. The catalyst within the converter
promotes a chemical reaction which oxidizes the HC and CO present
in the exhaust gas. This reaction converts them into harmless water
vapor and Carbon Dioxide. The catalyst also reduces NOx, converting
it to Nitrogen. The PCM monitors this process using Bank 1 HO2S
#2. Bank 1 HO2S #2, located in the exhaust stream past the three-way
catalytic converter, produces an output signal which indicates the
oxygen storage capacity of the catalyst. This determines the catalysts
ability to convert exhaust emissions effectively. If the catalyst
is functioning correctly, the Bank 1 HO2S #2 signal will be far
less active than that produced by Bank 1 HO2S #1. This indicates
that the three-way catalytic converters oxygen storage capacity is below
a threshold considered acceptable.
