Hi All,

I got a 92 civic with a 98 GSR, there was no ECL for the first day, I think I might wire the secondary O2 wire wrong, Code 5 is the MAP sensor or Vacume leak, How do I check the Vacume? Code 65 is the second O2, Please let me know the one black wire go on my car. 3 of them go to the ECU, according to the HELM the last one is connected to the PMI relay, But I don't know how it looks like on my civic, I checked for the plug that match the wire colors, but no luck. if you know it, please help. Thanks for all inputs.

 

What ECU are you using? Your car is an OBDI, which have no second O2 sensor. OBDII cars have the two. If you are using an OBDI ECU, are you running an OBDII/OBDI harness? As for the vacuum leak, spray some carb cleaner around the hoses and gaskets and check for bubbles caused by escaping air.

 

I'm running OBD II GSR ECU. I convert the OBD I harness to fit the OBDII ECU.