Wideband O2 sensor

[jammess]

Just got off the phone with an Innovate Motor Sports tech and long and short is the LC-2 or LC-1 simply won't work on an FJR with this floating ground not being in common with the power ground, end of story. He suggested connecting the two together and I told him I tried but screwed up the idle. He did say that this is not an issue with BMW for this reason. Then he went on to say that if I would have called him first and described the FJR ECU ground system for sensor inputs he would have told me it wouldn't have worked. He also said that this type of thing is showing up more and more in newer vehicle technology.

I thought an LC-1 might work because it has two separate leads one for power ground and one for signal ground but he said both these leads were tied together internally within the LC-1 so no joy there.

I give up. Looks like if you want to modify fueling on your FJR the Power Commander is it, I'll take a pass.

 

[Fred W]

OK, I went back and read through the section on fuel injection in the FSM. I think that I was mistaken and that you are correct. The only place in the operation that it shows the closed loop operation from the O2 sensor is during constant throttle / cruise condition. There is no O2 sensor feedback applied to the base injection duration except during that specific limited time.

 

[jammess]

I'm not familiar with vehicle emissions testing since I've never lived in a place where that is required. It kind of surprises me that it doesn't go closed loop at idle. I've decided the only way to get meaningful data at this point would be to have another O2 sensor bung installed opposite the existing one and just use the wide band sensor as an AFR data collection. Put the laptop in the trunk and make a realtime over the road recording. A project for another day and I'm not sure what this would really accomplish anyway in the grand scheme of things. I'm disappointed I can't use the LC-2.

I think I'll go ride while I still can because in a couple weeks it won't be pretty around here because of the GD eclipse with one million people projected to swarm into Oregon. That's a big impact for a state with only about 4.5 million to begin with and traffic problems enough as it is. Just ask people in Portland. NOT going anywhere! Going to stock up on groceries and beer and lock and load.

 

[jammess]

Just one question and I'm done. Is there a way to detect closed loop like a pin on the ECU changing state that one can monitor with a VOM meter? I might this winter, if I get good and bored, have a bung welded on my head pipe just ahead of the cat chamber.

Fred, what manual are you using that describes open / closed loop? I looked all through my 2009-2012 FSM and couldn't find anything.

Oops, that's two questions, sorry.