I have built my DIY wideband lambda sensor and now I need to check if it runs accurate enough. What values of AFR (or lambda) should I expect on stock Hondas:

1) at idle
2) when cruising with little throttle, constant speed
3) at full throttle?

Second question, where should be the sensor located? So far, I have put the sensor into my muffler tip and at idle, the sensor showed lambda 0.99 - 1.00 (AFR 14.7). Is this OK for idle?

 

Lambda should be 1 for idle and part throttle.
For full throttle a bit richer, but that depends on your mods.
How did you build your own lambda sensor?

 

I need to know some average values at wot for STOCK hondas.

Well, I work with electronics, so this was my home project. I have used Bosch LSU4 sensor.

 

i would move the sensor up farther in the pipe like into the header collector........ if you have a cat in the exhaust you want the sensor before the cat..... if you have a test pipe you can put it in either the test pipe or the header collector

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cjames235 &raquo;</TD></TR><TR><TD CLASS="quote">i would move the sensor up farther in the pipe like into the header collector........ if you have a cat in the exhaust you want the sensor before the cat..... if you have a test pipe you can put it in either the test pipe or the header collector</TD></TR></TABLE>
Does the cat really change the O2 amount in the exhaust gas?