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2010 K1300GT

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Jughead:

--- Quote from: Honolulu on May 06, 2019, 08:29:27 PM ---Yes. 

Poor combustion => excess fuel in exhaust => converter doing its job burning excess fuel => lambda sensor reading 0.8V

Exactly why I replaced the coils, and spark plugs, and coolant, while I was in there.  This meant I had to acquire the vacuum tool to refill the coolant, and the proper 5/8" or 16mm plug socket (the one I had was too big).  It's not a difficult job in retrospect, but given the complexity of the machine overall, I'm a leery of having to work on it.

Now that the "work" is done, and it still runs poorly, if a idle actuator reset doesn't get it right, I'm afraid I'll have to talk to the local dealer.  The only one in 2,500 miles.  Whose parts tech doesn't return calls.  Bad sign...

--- End quote ---

What does the O2 plot (graph) look like?  Does it look like the one I posted earlier?

schuppi:
Hello
Here happens exactly what I always miss.
There is a problem where help is desired, but nobody sends the necessary information for such complex systems.
Auto scan with error memory and a reading .csv file are extremely helpful.
Maybe something as deposited in this post, add to a request

http://forum.hexcode.co.za/forum/index.php/topic,697.msg2705.html#msg2705


A problem is quickly solved if the informations are available  :) like this:
http://forum.hexcode.co.za/forum/index.php?action=dlattach;topic=697.0;attach=376

Honolulu:
Jughead, I have seen the lambda values graphs for my bike in real time twice.  Once, while running properly, the value ranged up and down, same as your graph.  Later, when running poorly, the value wavered slightly around 0.8 volts.  The exhaust was clearly rich and the sensor value properly reflected that.

Schupppi, I'll post a summary of real-time values when I can.  My original post inquired whether such a summary for a correctly running bike was available.  To date no one has posted such.

Jughead:

--- Quote from: Honolulu on May 08, 2019, 12:55:59 AM ---
My original post inquired whether such a summary for a correctly running bike was available.  To date no one has posted such.

--- End quote ---

You keep on harping on about a summary that no one can post.  I have tried to explain why no one can post it but it appears that I am not explaining it correctly.

Put simply, the values should fluctuate up and down between about 100mV and 900mV.  These values can clearly be seen on the plot if you take the time to look at it.  In other words, the values must span the green belt in the graph.

If you graph hovers at the 800mV point, your heater element is working but sensor appears not to be working.

Do you know how lambda sensors work and what their function is?

Honolulu:
One more time.  I was looking for correct values (or range of values) for ALL parameters reported in real-time by the GS911.  Such parameters are a small subset of those observable by the dealer's proprietary software, but I'm not sufficiently informed to acquire that software or correctly install it on my laptop.

02 sensor values oscillate as was well documented in the graph you posted.  I have seen that variation using the GS911 on my bike, some months ago, but it doesn't do that now.

02 sensor function and the values it should be reporting is all over the 'net.  Yes an 02 sensor tends to fail lean, causing the ECU to richen the mixture and that matches what I observed.  But should not the ECU should have seen a P00xx or P01xx code if the 02 sensor is failed/failing?

That "your engine is running rich"  and "because your 02 sensor has failed" doesn't present the basic diagnostic link between the two conditions, which is what I am hoping to find, so as not to throw parts at the problem.  I may already have done that.

All that said, I do appreciate your contribution to the thread.  But "I are engineer" and need/want to grok the causal link between the observation (rich exhaust) and diagnosis of failed 02 sensor, since there are a good number of other possible causes.

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