i have a 97 civic dx with a 95 gsr i have had it in for about 8 months now. i never hooked up the knock sensor i need to know where the sensor plugs into the ecu at does ne1 know or have pics 2 show me. i also wanted to know how u can read the codes for my car it obd2 car but the motors obd1 idk how 2 read them do i have 2 make a harness if so how would i. i also have a surge at 1500 rpms it only when i hold the gas right a 1500 it fine below it and above it. i clean the idle air control vave and i also dont have a cold start it wont adle high it stays lower n then when it warmed up it goes back 2 a regular idle ar like 700 to 800 plz ne ideas would help thanks

 

Here is the pinout diagram of your OBD2a engine harness:
http://hondaswap.com/attachment.php?attachmentid=11

and a breakdown of the pinout functions is on this page:
http://hondaswap.com/reference-mater...pinouts-28667/

What I usually do to rewire since you are using OBD1 is snatch a wire that used to be for your 3-wire iacv, or one from the unused CKF sensor and just reroute it & repin it into the correct slot according to the diagram.

I'm not sure if you can get codes through the OBD2 port using a diagnostic, the OBD1 ecu I think it doesn't recognize. Might have to get them the old-fashioned way by bridging the service connector down by the ecu with a paper clip or piece of wire then count the blinks of the CEL!