got a new o2 sensor and didnt have one wired up before so how do i wire up the new o2 sensor its a 1 wire o2 and the motor is a b18a1 pr4 ecu (its all from a 90 integra)

 

there should be an empty plug around the front of the headers or under the motor near where the headers meet the tailpipe there should be two or four wires that connects to the sensor

 

Well if its a 1 wire O2 there will only be 1 wire for it should have a clear/yellowish plug sometimes its right off of a bracket thats held on by one of the tranny bolts so look at the motor it will be to the left somewhere or quite possibly more towrds the back as well.

 

yeah its a pr4 which uses a 1 wire o2 sensor thanks for the tips ill look around but what if i dont find any wires can i just splice into a certain pinout on the ecu and wire it directly my self??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wesleywhite989 &raquo;</TD></TR><TR><TD CLASS="quote">yeah its a pr4 which uses a 1 wire o2 sensor thanks for the tips ill look around but what if i dont find any wires can i just splice into a certain pinout on the ecu and wire it directly my self??</TD></TR></TABLE>

Yeah you can do that in fact I have done that to have a direct route from the connector on the passenger side right to the O2 sensor.....I dont remember which one it is exactly but could probably find it out.

What year is your civic or crx?

 

its a 90 hf i bought the car with the swap already in it and the wiring is horrible and smells like fuel when the car is running so im gonna get a new fuel filter put in the o2 clean the fuel injectors and replace the hoses running from the canister and gonna try and clean my iacv... sometimes it runs perfectly fine the other times when i start it up it will have a really low idle sometimes will even die out so im hoping to fix some of these problems...

 

Well im not sure if the HF is in the same spot as the Si (I dont see why not?) but I would double check but if it is the same if you are looking at the round plug on the passenger side (engine harness and chassis harnesses meet) if you have the plug so that the the disconnect tab (the tab that you have to press to release the 2 plugs from each other) it SHOULD be a white wire on the right...If you are looking at it the same way I descibed there will be 3 wires in a row it would be the far right one and it should be white (I know I repeated myself) let me know if that helps or I could try and get pics if needed.

 

ill check it out tomorrow when i get off but i know exactly where ur talking about ill get back to u tomorrow and hopefully ill find a wire if it wasnt cut or ripped out by now i swear this wiring is terrible im really debating on getting a new harness and starting all over.. but thanks for the info and like i said ill get back to ya tomorrow

 

alright i guess i have no idea what ur talking about i thought i did but theres no white wire u got any pics or u want me to post some pics of my engine bay or should i just run it directly to a pin out in the ecu and if so which one??/

 

Yeah take some pics and i will try and point it out on your harness..

 

sorry for laggin on the pics i having uploading problems so ill post them up tomorrow no later...