i have a 91 b18a1 that i (semi recently) swapped into my 88 crx si. i used the stock harness, lengthened where needed. i have a chipped pr4 running the stock program (turboedit). ive been running with no o2 sensor for a while with the hole plugged up with a bung. i had the o2 shut off on the program since doing the swap. my question is that harness for my crx is a 2 wire. the correct one for the integra is a one wire. is it possible to run a 4 wire o2 like in the obd1 tegs without actually going obd1? im trying to get myself situated to boost but i plan on getting a wideband kit first. its my understanding that the 4 wire o2s are much better for tuning. any help on a solution or harness/ecu pinout alterations would be greatly apprectiated. thanks.

 

2wire o2? Never seen one.

As for a 4 wire being any better then a 1wire. Nope, Same ----, just has a heater in it.

But. For the 1wire and 2wire, I'd assume the extra wire would be a ground? If so, just connect to the sensor output to the 1 wire, or run your stock CRX sensor.

 

thanks! i didnt expect such a prompt response. during the swap i noticed that the stock harness is set up different than any one ive ever seen on any crx or civic. it doesnt surprise me that the o2 setup would be weird as well. one more quick question if youd allow me to pick your brain.....i know that in later tegs and civics (92 and up?) honda added a heater wire for better readings. any possible way to incorporate that into my setup? appreciate the help!

 

No. The ECU regulates the amperage going to the sensor. Plus it's not worth it. The stock sensor is useless everywhere but at idle and cruising.

 

thanks again.....you the man