im trying to do a header right now on my 94 LS and the only thing hampering my progress right now is the dang o2 sensor

i cant seem to disconnect the harness that connect the o2 wires up to the ecu wiring

does anyone know how that harness works?

 

Squeeze and pull.

 

what he said. use a flathead to pry em apart if you are too weak

 

after some blood scraped knuckles and some skin on my undercarriage i got it, but i left the upper portion of the header in my gf's car and the o2 sensor has all but welded itself onto my stock B pipe my stregth wasnt a factor it was more a case of very cold plastic that didnt want to move and my not knowing how it connected, but if i were to do it again i would be able to do it in no time

so tomorrow i go get a new 02 and forget OEM cuz even my dealer cost was $167