hi i have a 1996 honda accord with a f20b hmo engine, with headers typhoon intake and other things like bigger cams and apexi exhaust. but i was looking and i found two wires with plugs on them the plugs are green they look like the o2 sensors so i looked them up and i cant figure out where they plug in. the headers do not have a o2 connector that i can see. but would not having the o2 sensors plugged in give me horrible gas mileage ? im getting around 10mpg please help.

 

Your post is confusing. How many electrical connectors are not plugged in? What are the wire colors going to each of those connectors? In relation to the engine, where are these connectors?