OK....I just installed a test pipe on my 99 Civic Si and also purchased a Rear 02 Simulator from Caspers Electronics. Now I get a CEL with a code of 65. Has anyone installed one of these before ? If so, can you tell me which color of wires go to which color on the Rear 02 plug ?

Also, can someone tell me which wire from the ECU is the rear 02 wire that gets tapped for a A/F ratio gauge ?

Thanks for everyones help !!

Robert
99 Civic Si