domani2k

hey there, just finishing up my swap (b18c using stock cx harness) and am just confused whether or not i will need to hook up the cps. I am using a p30 obd1 ecu. If obd1 ecu's do read the cps, how do i go from the 3 wire plug on my harness to the 2 wire cps socket? which wire do I omit? Any help would be appreciated.