How do you hook up the blue wire to get the o2 reading on a 94 B18b?

 

I'm assuming you're talking about a AFC. If so run the blue wire off the AFC to the o2 wire on the ecu. To read the O2 sensor voltage goto the main menu scroll down to and select the etc. menu. Select the sensor check. Of the three readings, O2 voltage will be the middle one (#2). You will be set.

 

Any idea where to get a wire diagram for odb2 99 integra LS automatic? apexi's manual only shows which wire your supposed to be using, not nice enough to through which wire is the o2 wire in there

 

I think it's the fat white wire to the ECU. Or, you can just run it to the O2 itself.