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deleting rear O2 sensor

aussie said:
$4.50 DIY O2 Sensor MIL Eliminators
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Great link, except...
OP said:
its an 05.
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[TD="width: 100%"]NOTE (07/17/2007): The circuit presented here is identical (give or take some component values) to every commercial MIL eliminator I have examined--at least a dozen. However, you may find that it does not work with newer (2001-1/2+) cars because of advances made in both engine control software and processing power.[/TD]
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I searched ebay, and there is not an option for a 98 grand prix. I would like to get one with connectors already on it so I do not need to splice into the harness. There is one link to a source that is over $50. Does anyone know of other sources that are not splice kits.
 
Can I purchase a PCM which the code P420 removed from it? I have a 2005 Pontiac Grand Prix GTP Comp G!! Out in Phoenix, Arizona if there is a Mil on they fail the stupid Emission test so I need this to pass emissions.
 
I have a 01 and my rear o2 sensors bad and I'm getting horrible mileage so IMO it's better to just put the o2 in like I will be doing when I get cash
 


Ok, I've got a question that I'm inclear on, I've got a 03 gtp, bought a 3" catted sow pipe from zzp, so with tuning out the code using HP Tuner, no non-report, will the car run as efficient or will I'll still run rich but just not throw the code?
 
SuperChargedGTP said:
Ok, I've got a question that I'm inclear on, I've got a 03 gtp, bought a 3" catted sow pipe from zzp, so with tuning out the code using HP Tuner, no non-report, will the car run as efficient or will I'll still run rich but just not throw the code?
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The way I understand it, the rear o2 is only monitoring the efficiency of the cat. It won't affect the trims. That's the job of the front sensor.

Though, I have heard of some ecus trimming fuel if the rear o2 is out of bounds to protect the cat, not sure if this happens on our cars though. I just set mine to not report and disabled the cat check, or whatever it is. Its some test that the pcm does to richen the mixture for a bit after a certain temp. Just max out that temp in the tune.
 
I've read that thread before. I must have got lucky with my 01 because I've never seen the rich cycle. I thought it was because I maxed out the temp for the cat check?
 




Yup, DHP and Tiny Tuner. The 01/02 cars can get away from it by using a 98 pcm but that won't work for an 03 car due to the change in trans controls for that year.
 
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