Sorry for the stupid question. I've been reading for an hour and haven't found enough answers to be comfortable.
If I'm checking my CO% on my CIS car, do I unhook the o2 sensor first?
Like this?
1. Unhook o2 sensor.
2. Set mixture to about 3 - 3.5% CO.
3. Reconnect o2 sensor and watch it lean out to .5 or something.
No, I don't have a cat.
I do understand the arguments for leaving the o2 sensor disconnected, but I think I'd like to have it in the loop.
Thanks
edit: I just looked in my Haynes and it says to unhook o2 Sensor and get a reading of
.4 to .8 (USA)
1.0 to 2.0 (UK)
arrrrgh someone enlighten me.
Thanks