Anyone tried programming out ALL of their oxygen sensors?
Registered User
Joined: Jan 2006
Posts: 78
Re: Anyone tried programming out ALL of their oxygen sensors?
Well this is a shot in the dark, but could it have been the EGR. My car was slow off the line and had problems running rich and it tripped the EGR valve code. Its just a another suggestion to the problem.
-Brandon
-Brandon
Registered User
Joined: Dec 2003
Posts: 710
From: Fort smith, AR
Just out of curiosity but I have been suspecting my O2 sensors to be causing my idle problem.. If I unplug them both will that clear up the problem if it is infact bad o2 sensors? Or atleast point towards bad o2 sensors? The car has a mail order tune also..
Registered User
Joined: Jun 2007
Posts: 377
From: Clifton, NJ
good hread, im actually learning a bunch of different things to troubleshoot if its not my o2's because im actually having the same problems as you guys.. go figure. maybe a stupid question but what does EGR mean?
Registered User
Joined: Aug 2005
Posts: 178
From: Hutchinson,KS
Sure, you *can* do that. What you would be doing is running an Open Loop program. You set a parameter (such as Min cool temp for closed loop) to a level that can not be reached (150.5°C for instance), and you will never enter closed loop and thereby not use your o2 sensors for feedback.
I've been running an open loop program for about 2 years now, it has its advantages and disadvantages. There is no searching of the o2 sensors and the subsequent corrections to the fuel delievery, so everything feels smoother to me. Gas Milage was not one of my concerns though and I still have a lot of tuning to to if I want it to run efficiently (just a toy for now).
I think this could be used to accurately tune the A/F but it would require, IMO, a lot of time and constant monitoring and adjusting, as well as a suitable sensor to tune with (wide band O2). I plan on having a semi permanant mount wide band O2 sensor within the next couple months (LM1, hopefully with a newer interface, to switch between my two cars for tuning) and then I'll get back into the PCM side of things on my T/A.
LM1 can be seen here...
http://www.innovatemotorsports.com/lm1.php
Don't know if that is the answer that you wanted, but that is my take on it anyway. You can't really just program out the front o2 sensors like you can the rears. The rears are really nothing more than a check that your catalytic converter is still in place and functioning. Programming them out is nothing more than just telling the PCM not to set the CEL for rear o2 failure.
HTH.
I've been running an open loop program for about 2 years now, it has its advantages and disadvantages. There is no searching of the o2 sensors and the subsequent corrections to the fuel delievery, so everything feels smoother to me. Gas Milage was not one of my concerns though and I still have a lot of tuning to to if I want it to run efficiently (just a toy for now).
I think this could be used to accurately tune the A/F but it would require, IMO, a lot of time and constant monitoring and adjusting, as well as a suitable sensor to tune with (wide band O2). I plan on having a semi permanant mount wide band O2 sensor within the next couple months (LM1, hopefully with a newer interface, to switch between my two cars for tuning) and then I'll get back into the PCM side of things on my T/A.
LM1 can be seen here...
http://www.innovatemotorsports.com/lm1.php
Don't know if that is the answer that you wanted, but that is my take on it anyway. You can't really just program out the front o2 sensors like you can the rears. The rears are really nothing more than a check that your catalytic converter is still in place and functioning. Programming them out is nothing more than just telling the PCM not to set the CEL for rear o2 failure.
HTH.
Thread Starter
Registered User
Joined: Apr 1999
Posts: 220
From: South Bend, IN
I still have the car.Yeah...2004. The problem was actually two-fold. It was a bad EGR, which has now been programmed out and one spark plug wire wasn't firing because the conductor wasn't making contact. These were the custom wires that you have crimp. Apparently, I goofed one of them back then and didn't know it. Car runs like a champ now, and has for a few years.
Thread Starter
Registered User
Joined: Apr 1999
Posts: 220
From: South Bend, IN
Wouldn't that make your car run REAL rich? When my car was like that, I couldn't stand that gassy smelling exhaust. I mean, it's like you're in 'choke mode' all the time.
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