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01-05-2012
Great link, except...Originally Posted by aussie
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.
01-07-2012
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.
01-07-2012
I have one from wbody never even opened it. It plugs into the harness. No splice
06-27-2013
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.
07-12-2013
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
07-12-2013
Rear o2 doesnt didnf effect my mpg. I had a bad one that threw cel and I got the exact same mpg
07-12-2013
Why do you gotta rub it in dude! Lolol
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05-25-2015
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?
05-26-2015
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.
05-26-2015
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?
05-26-2015
It will still run the test looking for the change between the front and rear sensor.
05-26-2015
That sux. So changing the temp doesn't stop it. So weld in another bung and stick the o2 back in using the spacer?
05-26-2015
Or turn it off using dhp
05-28-2015
nevermind lol
Last edited by GERRY; 05-28-2015 at 06:48 PM. Reason: Not having English as a first language lol
05-28-2015
Dhp is the only way to turn off the cat test.
05-28-2015
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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