O2 wiring help
 

Hey all car is a 00 ex civic
Ive had a previous thread trying to figure out why my car would shut off after i let off the gas.. someone said the O2 sensor.... problem is, when i bought the car, someone had cut off the CAT and cut the wires and plug for that sensor.. i had another one laying around, and i wired up the two colored ones then there were 2 black wires, i have no way of knowing which black wire goes to which one... i guessed and the CEL went away, but i still have the cut off problem... thanks for the help