O2 Sensor and 4-2-1 Headers Help

[jar25201]

So what should I honestly do? I took my ugly cracked stock headers with catalytic converter off and replaced with a 4-2-1 setup which does not have the catty but didn't think about secondary O2.. opps.... Do I keep my O2 sensors and make an extension for the down-flow or remove and try and turn CEL off since there is no catty?

 

[civic21911]

If there is no cat in the system the cel will trip. Unless you use a spark plug defouler thats what I have been using for two years now.

 

[~XhAuSt~]

You can buy what is called an O2 simulator which i think they run for about 50 bucks. The spark plug defouler works as well, when i bought my spark plug defouler though the depth wasnt enough for the O2 so i had to try and dremel it out and such did anyone else have that problem?

 

[Intertwined]

if you search around enough you will see where people use 2 defoulers. one drilled out to fit the o2, then attached to another that isnt drilled out so that it limits the amount of exhaust getting to the sensor.

the other option is to swap to an obd1 ecu with jumper harness

 

[jar25201]

yeah now it's too raspy and im really thinking about going back stock just to be quilter or maybe a resonator would do the trick. i like the spark plug defouler idea.

 

[emerican]

thats what i am running on my car is the defouler trick i have 2 like said above i drilled out the first one for the 02 to fit in then screwed the other onto it and dropped it down into my test pipe no cel whatso ever.