im swapping a jdm b16 into my friends 91 si the ecu that came with the engine is a pr-3.now the question is i noticed there is two single wire o2's, would i be able to get away with one o2 or will the ecu throw o2 code.has anyone used one o2 with the pr3 without probs?can someone help me out here thanks.also if this matters i noticed that there is only one pin out on the pr3 for the o2 sensor not two like the obd-2 ecu's.

 

please do search bro

from what i can remember you can just splice 1 wire to hook up the 2 o2 sensor but that's a getto way to do it. do it correctly so that the motor will run how it should!
using 2 o2 sensors will be better because on reads how the cylder 1-4 and the other reads #2 & 3. Someone else please help me clearify his part!

 

my friend is going to buy the zdyne ecu in a couple months,the zdyne only uses one 02 sensor that why i want to wire it up to use one 02.is this posible?

 

If he gets the Zdyne ecu, then yes, you can use 1 one-wire O2 sensor.

 

computer gets to tune two "banks" of 2 cylinders if you put it in the way honda designed....

take your header to the metal/exhaust shop and weld in two 3/4 inch bungs (nuts) but check them for size first against the threads on the o2 sensor...

email or im me if you need to kno the angles and location of the sensors...i dont have a camera to send image but you may find them on the net...

 

he' putting on a rev hard stage two kit ,so if im going to use two 02's where would
the proper placing be for both 02's?or should i use one 02 6-8 inches away from the turbo.which is better?