well I have a friend with a DX hatch and a SIR engine in it. He needs me to help with the wiring, to my understanding the MPFI has been done and the car used to run before he destroyed the axles bc of bad mounts. so i think that part of the swap is fine

according to the site
http://b16a.honda-perf.org/theswap.html

it seems like i have 4 more wires to run
•oil pressure
•knock sensor
•vtec seliniod
•2cd O2 sensor

can i tap into the primary O2 sensor for the second one or even leave it off?

i have done an obd-1 d16z6 swap but this is a little different. thanks for you help.

 

up up and away, for the day crowd.

 

if hes running the stock exhaust manifold there should be two o2's there. if not get another bung welded on, or get the ecu chipped.

 

yes per the PW0 and the PR3 both control cylinder pairs not the entire engine, use both, one reads pairs 1-3 and the other 2-4 not sure which is which however.

Pairing or chipping both will lead to not so great milage.

 

i know he has headers on the car, but i am not sure if it has a second bung for the other O2 sensor.

coudl i just weld another bung right next to the first one?

 

will like I said if one doesn't see 1+3 and the other 2+4 seperately its no going to run right.

 

if you tap into the second O2 sensor this will split the strength of the one signal. i'm not sure how well the car will run (or not run) like this. for now, i have my B16 running with just one O2 sensor. it runs, but i'm sure its not up to 100% power since i'm not using both sensors. so to answer your question, yes you can run with just one sensor watching over a pair of cylinders.