How to correctly move 02 sensor?

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Alright I finally found a header that has two 02 sensors, one of them is on the header, and one is on the down pipe near the cat. I was wondering how to move the 02 sensor down by the cat, and which one I should move.

Should I move the 02 sensor with the green plug or the 02 sensor with the yellowish/clearish plug?

How do I go about doing that? Standard wire connected to the 02 wire?
 
You have to have one O2 monitoring cylinders 1&2, the other monitoring 3&4. You'll need a 4-2-1 header with an O2 at each secondary if you want to run it as stock.
 
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Well, only one 02 sensor monitors the #1 cylinder..
This is like this on all aftermarket headers..

Even if I relocate the 02 bung to the #2 cylinder, it still wouldn't monitor 2and3..

The only way to have them monitor 1and 2, or 3 and 4 is weld bungs on the downpipe before it goes into 1.

Any input?
 
I got lucky and got a original rsr from hmotors last week that is made for the obd0 b16. Only cost 180 shipped to Alaska.
 
take it to an exhaust shop and have another bung welded into the 2nd cylinder.

problem solved.
I could do that but exhaust shops are expensive.. I've been thinking about taking a nut that matches the threads of the 02 sensor and welding it to the piping and then drilling the hole.. Would that work?

Would it work if I moved both 02 sensors to the downpipe before it goes into 1? I think that would look a lot cleaner especially if I got a header with now 02 bungs..
 
if an exhaust shop trys to charge more than 30 to do that. then they should be stabbed in the eye with a rusty hanger.

whats 20 or 30 bucks to have it done correctly?
what part of tn are you in?
 
obd0. its not a primary and secondary.
one runs 2 cylinders and the other runs the other two.
if he put one in each bung that he currently has, one will read correctly while the second is reading for all four cylinders.
 
obd0. its not a primary and secondary.
one runs 2 cylinders and the other runs the other two.
if he put one in each bung that he currently has, one will read correctly while the second is reading for all four cylinders.
got ya...yea just go have it done at a muffler shop
 
or buy a different header --- pretty pricey
convert to obd1- ----------- pretty pricey
go to a muffler shop------- cheapest way to do it correctly.
 
obd0. its not a primary and secondary.
one runs 2 cylinders and the other runs the other two.
if he put one in each bung that he currently has, one will read correctly while the second is reading for all four cylinders.
Correct. But the way the 4-2-1 header is designed there is no way to monitor two cylinders at one time. Only one.

Only way I see to do it is have the 02 sensors at the downpipe before is goes into one pipe.

It seems like it would work like stock, just slightly different..

But I would have to add wire to my O2 sensors, can I do that like any other wire? Just solder it in?

I'm in west TN, Lexington to be exact.. About 1-2 hours from Nashville, depending on what part you are going to.
 
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hmmm...i wasnt aware a b16 has 2 o2 sensors..obd0? my p28 is obd1 and i only have one o2..learn somethin new everday i guess
 
you got a header for a 99 civic si basically. it's not going to work.

this is what you want:



1/4 and 2/3 wired to the right port on the ecu.

1/2 & 3/4 as stated above is WRONG
 

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I didn't order that one I posted, it was just a reference.

That looks like a stock header.

As I said before, I think if I put the 02 sensors where the downpipe meet the header before it goes into one, I think it would work.
 
I didn't order that one I posted, it was just a reference.

That looks like a stock header.

As I said before, I think if I put the 02 sensors where the downpipe meet the header before it goes into one, I think it would work.

Not trying to talk bad but you should get the appropriate header and weld the bungs on correctly or just keep your eye out for a used rsr obd0 b16 header. If you keep looking on hmotors then you might see one within 3 or 4 months.
 
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