Ok I have a 90 crx si with a b18b1 obd1 pr4 ecu and I was wondering if anyone knew how to wire up a 4 wire o2 sensor I can't seem to find anything about it. Thanks

 

R u using an ecu jumper harness, or hardwired?

 

Ecu jumper harness

 

I am also getting a cel code 4 crank position sensor does anyone know where this is located I had tried a new dizzy and ecu and it didn't help and I can't figure out where its at in the dizzy or on the block thanks

 

Crank sensor is in the distributor. You can get the wiring from the jumper harness for the o2 sensor.

 

Ok I'm not sure where to wire up my o2 sensor on the jumper harness I bought the car and it was like this guess its true don't buy someone elses project but for the crank position sensor I tried a new dizzy and ecu and still got the code 4 that's why I was asking is there any certain place for o2 sensor wiring and thank you for the help I'm just trying to get my car out of lim

 

On the jumper there should be a loose wire for the o2 heater. I made my own pinout cuz I couldn't find one either. Ill post it as soon as I photoshop it up

 

Ok thanks

 

I wrote this with an expectation of u knowing some of the terminology....


The o2 signal is the one that comes from the old 1 wire o2 sensor plug.

as for the ground, i normally wire that up to the bulk of grounds that are grounded to the thermostat.

if u are completely obd1 the correct way u should have a plug that looks like this
that plug is ur 12v source if u dont have it. i would look for a good ecu controlled 12v source

the o2 sensor heater should be a loose wire on ur ecu jumper harness. if not u should wire the o2 sensor heater up to ecu PLUGA PIN LOCATION 6




hope it helps brotha

 

I will check and see if I had that plug after work and I will take a pic of my conversion harness as well

 

Compliments of rywire.com
http://www.rywire.com/catalog/articl...?articles_id=1

 

Good luck bro let us know how it goes