i am currently running the b16 with turbo in my 91 ls integra with the pr3 ecu. i am only running one o2 sensor right now in my down pipe about 8 inches from my catalytic converter. And my car has recently started to bog due to the absence of the other o2 sensor i think. i need to know where to place the second o2 sensor and which pin outs are for o2 #1 and o2 #2. correct me if i'm wrong but i heard c16 is o2 #1 and c8 is o2 #2.