Simple and easy question for the gurus..
Currently transplanted a jdm b18b into my civic and its running on a chipped p28 (yes it does look for the primary o2), I plan on installing a dc header that has no o2 bung but the high flow cat I have still has an open bung for the secondary o2. The question is would there be any negative effects to relocating the primary o2 to the secondary o2 bung on the cat after the header install?

Now from the research I've done previously it leads me to believe this would not be an issue since all obd1+ o2 sensors on civics are heated, but would the primary o2 send improper readings to the ecu since its relocated further down the exhaust?

BTW the current primary o2 location is right before the flange on the header.

 

chip the comp to delete secondary o2 sen what tune you running on ? yes it is right b4 the flange cocked to the passenger side a lil. like my... any ways not much sence to run it if 0bd1 i see that you said it looks for it tho. but if you located it after it will be fine and actually i perfer having mine further back for tunning issuies

 

It should be ok if it running a test pipe.

 

I can not understand the post below my initial post at all.. sorry dude

The car is running on a chipped p28 (ls basemaps) but that is besides the point...

The 'high flow cat' came with the car and that's what the kid called it.. it definitely resembles a cat and not a test pipe, but it still has the secondary o2 bung.. still think it would work?

 

no u should get a test pipe.

 

The other guy pretty much said it'll work but like I said ur ecu will get false reading with any kind of cat.

 

If you have a chipped ecu, you can edit the map so the ecu doesnt look for o2 sensors.

 

I know you can eliminate the o2s but I'd like to run atleast one o2 sensor for safety reasons on my daily..

Guess I'll have to buy a test pipe..