Wait if the civic harness already is setup for a four wire then just extend the plug to the teg motors o2 sensor, no need to make a mess at the ecu.
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Don't bother giving me "rep", I won't return it and I think it is stupid.
Gracie Barra Clearwater
Gyms in Clearwater, St. Pete and Port Richey
pm me if you are interested in trying a free class at any of the gyms.