soobie_newbie67 Posted April 18, 2013 Share Posted April 18, 2013 i cant seem to find anything on it. i would like to eliminate it so i may remove my bad cats. Link to comment Share on other sites More sharing options...
matt167 Posted April 18, 2013 Share Posted April 18, 2013 You cannot get rid of the sensors without a CEL. You can trick the system by using spark plug anti foulers with the sensor still in the pipe.. Google search will find several tutorials.. Link to comment Share on other sites More sharing options...
soobie_newbie67 Posted April 18, 2013 Author Share Posted April 18, 2013 is this a legit fix? http://answers.yahoo.com/question/index?qid=20110531170853AAflhLq xD. they talk about removing the rear o2 sensor, while keeping it plugged in, and zip tying it off to the side in the open air. Then just plug the hole. Link to comment Share on other sites More sharing options...
idosubaru Posted April 18, 2013 Share Posted April 18, 2013 rear O2 delete - sure, just remove it. the ECU doesn't use it for anything. ha ha - that would be awesome if you can just leave the O2 dangling, that sounds awesome! you can use an old one to try it out - don't even remove the existing one - just find another used one to plug in and see what happens. would take like 1 minute to do that. Link to comment Share on other sites More sharing options...
dballs Posted April 18, 2013 Share Posted April 18, 2013 If your worried about the cel and inspection test, the 96 is exempt from the laws. Every time the car is shut down, it clears the computer and the readiness monitors are never ready. Clear the light, pull it into shop for inspection. Link to comment Share on other sites More sharing options...
soobie_newbie67 Posted April 18, 2013 Author Share Posted April 18, 2013 I'm not worried about emissions where I live. we don't have check ups. I would just like to remove the cats and not have a check engine light. Link to comment Share on other sites More sharing options...
86BRATMAN Posted April 18, 2013 Share Posted April 18, 2013 the anti-fouler trick is the only way I've ever seen actually work. Link to comment Share on other sites More sharing options...
Rooster2 Posted April 18, 2013 Share Posted April 18, 2013 I just replaced the rear 02 sensor in my 98 OBW last night. I still have the old one, if you want to try the trick of dangling your existing 02 sensor outside the cat converter. You could use my old one to fill the hole in the cat converter. Let me know..............Or............the more that I think about your post, you are wanting to replace or remove the cat from your system. If so, you wouldn't need another sensor. Link to comment Share on other sites More sharing options...
Numbchux Posted April 18, 2013 Share Posted April 18, 2013 is this a legit fix? http://answers.yahoo.com/question/index?qid=20110531170853AAflhLq xD. they talk about removing the rear o2 sensor, while keeping it plugged in, and zip tying it off to the side in the open air. Then just plug the hole. No, the computer will know that the sensor reading is too low, and still throw a code. It's intentionally very hard to trick. Link to comment Share on other sites More sharing options...
idosubaru Posted April 18, 2013 Share Posted April 18, 2013 if you search, folks have i believe worked up a resistor that can trick some systems...maybe older ones... seems simplest to just install the sensor as-is and install an extender for $5 and be done with it. Link to comment Share on other sites More sharing options...
Rooster2 Posted April 19, 2013 Share Posted April 19, 2013 if you search, folks have i believe worked up a resistor that can trick some systems...maybe older ones... seems simplest to just install the sensor as-is and install an extender for $5 and be done with it. I think original poster wants to either change the cat to a unit with no 02 sensor hole, or eliminate the cat, and is asking what to do with the 02 sensor, as he then would not have nothing to screw the sensor into. Then, he is wanting to devise a solution so as to not have the sensor trigger a CEL. There in lies his question. Link to comment Share on other sites More sharing options...
soobie_newbie67 Posted April 19, 2013 Author Share Posted April 19, 2013 actually the housings for the cats woukd still be there, so I would still be able to screw the o2 sensor in. I just don't want a code Link to comment Share on other sites More sharing options...
torxxx Posted April 19, 2013 Share Posted April 19, 2013 find a 98 EJ25D cat. Mine had 2 cats, but both sensors were in the front cat. Runs fine, no CEL Normally the O2 sensor would be back behind the tranny. I've ran mine for 12k miles so far and have never popped a CEL. No heat shields on any of my exhaust either, and everyone said that would cause a Cat converter code... Link to comment Share on other sites More sharing options...
efseiler Posted April 19, 2013 Share Posted April 19, 2013 I don't think it's wise...the computer needs both data points to adjust the mixture correctly. Link to comment Share on other sites More sharing options...
matt167 Posted April 21, 2013 Share Posted April 21, 2013 No, the rear O2 only checks catalyst effiency. Only the front O2 adjusts the fuel mixture. What happens with the rear is if the signal fluctuates from lean to rich to greatly, it will light the CEL. If it stays within a certin range it knows the Catalyst is working Link to comment Share on other sites More sharing options...
unibrook Posted April 29, 2013 Share Posted April 29, 2013 Just a couple of data points to toss in for those suffering the occasional PO420 CEL. My car is a 2001 Forest with 120k miles on her....yes, she is a Lesbaru. My CEL PO420 has been coming on about thrice per year lately. I plug in my CEL Scanner and erase the code and drive on my merry way. Since we do limited, mostly city driving, it can take a while for Emissions Test Ready reset cycle to complete.....so you can pass inspection. This month, it took about 189 miles and nearly 3 weeks of driving to get the pending PO420 to turn off and the Emissions Ready Green Light to appear in my CEL Code Scanner. Then it passed inspection no problem. Link to comment Share on other sites More sharing options...
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