I'm running a hondata 3b with in a 99-00 Civic Si and have a OBD2-->OBD1 conversion harness connected to a p28 ecu. I'm trying to get my Autometer A/F gauge to work by connecting the gauge signal wire to the ecu and not having to run the wire to the actual o2 directly. Origionally before I did the OBD1 conversion I had the A/F signal wire connected to the thick wire wire on the blue (D) plug that connects to the ecu... I'm almost positive that the P28 uses pin D14 as the A/F signal... though when I trace the same thick white wire from the 99 factory harness through the conversion it ends up being D9 on the P28 ecu... Anyone know what D9 is on the P28? or where I have to tap into the wiring from the ecu to make the gauge work....?

 

D9 is leading to the alternator.

The O2 pinout is D14 and that is where the A/F needs to go.

 

thats what I thought but for some reason the damn gauge won't work...maybe the gauge is dead... it just sits on green (rich) and doesn't move.... I'll mess with it more today.

 

I'm the biggest crack head on earth... I solved the problem... stupid me... I pulled off the T tap connector off D14 and was getting ready to just wire the damn A/F sender wire to the actual O2 itself, when I noticed that my shitty connector didn't cut through the damn wire sheeth... I used a different T connector and it works fine now... Damn I'm Stupid (must be lack of sex)

Thanks anyway guys for the help.