Anyone?
Anyone?

 

yes. at idle it's richer to the point that my car is mis-firing. at full throttle, it's the same as before. don't know why it's doing this though.

 

Funny, my idle is smoother. Anyway, how can you monitor your o2 at idle since the ecu is in closed loop and it will fluctuate continuously? Full throttle I didn't notice any difference in 02 sensor voltage from the stock sensor. I don't have the WB yet.

 

With the stock ECU, idle is open loop, not closed.