O2 sims

[Go4broke]

were do I get O2 sims for my headers? All I see is O2 sims for the Cat.

[John_D.]

You need to keep the real o2 sensors in the headers. Otherwise the pcm will not be able to manage the a/f ratio at all, including at idle and part-throttle. You can only use sims for the post-cat (and maybe the pre-cat if you have one).

[Formulao96]

Take it from me...dont put them before the cat...bad mistake. All you do is burn plugs, run insanely lean, and the car runs like ****.

[Go4broke]

so is there any way to get rid of this code (P0420 bank one)

[John_D.]

Sounds like a bad o2 sensor, or bad connection. You'll probably need to replace the sensor to get rid of the code. It will probably run better then too.

[Paul Collins]

the O2 sim is horrible for throwing that code over and over again. I finally gave up and put my O2 sensor back in. But I did feel a big drop in power.