So just built my ALL MTR H22 and I have S300 but not a wideband at this time, got P28 with Hondata from phearable.net I listed all my mods and was told I had a basemap to get to tuner with. I downloaded Hondata app and its showing some O2 voltages and some lambda readings but there not in the 14.7.1 way its more like 0.18 for start up and then 1.00 (V) at 2k rpm in fifth babying it. Ignition advanced at 13* at warmed up idle pretty cool app if you ask me but I dont kno what these voltages equal out to. Any help.

 

Most of your basic driving basemaps will be rich (just as yours is). This is to error on the side of caution. You can change how things are displayed in the Hondata App, but for your reference this is an example:



As you can see the closer you get to 0.00v the leaner it reads. The closer to 1.00v the richer it reads although it is a VERY narrow range. The reason 0.00v is lean is to protect the engine if the sensor or wiring fails or some other issue and the ECU ceases to get a voltage signal.

 

Thanks this helps!

 

So that would make the ECU think its lean and run a limp mode enrichment?

 

What would? Reread my post above and pay special attention to the sentences under the picture.

If you are saying it reads 1.00v while driving then your O2 sensor is most likely working. You need to get it to a tuner that has a wideband O2 or purchase one yourself. Using a narrowband for anything is utterly pointless.

 

no you were saying if it loses connection and doesnt send a V. at all the ECU will see 0.00v so does that in turn make a enriched limp fuel map?

 

As said before, yes... but a CEL should be thrown on an unmodified ECU.

 

Ok well do you think I should disconnect it? so it goes into a limp enrichment fuel map? or do you think as long as I take it easy to the tuner it will be the best bet? I kno there is really to many variables to really kno and say for sure but what you think?

 

If you are already running with 1.00v on your logs while driving it is already rich. Either get a wideband or take it to the tuner. I have no idea how far your tuner is, what the map looks like, or any real relevant information to say for sure if you should drive it there. You could always just trailer it there if you are concerned. Running too rich is a bad thing as well you know... Contact your tuner and ask him what he thinks about your situation.