I received a care package from St Paul H-D two weeks ago that included a new ignition coil and finally got around to installing it on Saturday. As Monday was a public holiday where I live and the day was nice and hot (around 29°C) I took the opportunity to go for ride - around 440km of slow traffic, high speed boring motorway, nice twisty tarmac and ~50km of dusty gravel. The bike ran like a champ, no check engine light and no misfire.
It's early days, but I'm sure on a multi hour run in such warm weather it would have stuttered and misfired in the past, and I had got used to seeing the check engine light on my commute in to work during the week. No check engine light and it pulled strong all day - I'm tentatively calling this fixed
Check your AFV on the ECM parameters/AFV settings page of ecmdroid.
Hey upaero, what AFV am I looking for? I haven't actually looked at ECMDroid since replacing the ignition module, the bike is running great, no check engine errors and no misfire.
The engine temp he is seeing is in Celsius. The warm up enrichment (WUE) tables enrich the fuel until about 200C. The fan doesn't come on until 220C. This is measured right at the top of the head, very close to the combustion chamber. Of course the cylinder walls will be much cooler. An engine temp of 241C is a bit excessive though, which is a result of running lean.
CLT Tables.png
I thought that sensor was just a "switch" to turn the fan on and off by basically telling the ECM when it reached a certain point. I learned something today.
Sorry for the delay in getting this - I finally had time to do a 45 minute highway loop with the phone on so I could take screenshots. It looks like my AFV is normally 90% - I checked it over a few days multiple times - here it is about 20 seconds after starting the engine at idle:
Screenshot_20210209-175723.jpg
Here it is after a 5th gear run up a long shallow incline at about 110~120km/h (~3500rpm), still at 90%:
Screenshot_20210222-175909.jpg
I have *once* seen it at 85.5% on a different day - again at the top of the same incline but this time I went up in 4th (so ~4000rpm+ for a few minutes - this is also the highest temp I've seen over the last few runs, 237°):
Screenshot_20210222-175812.jpg
That last one is a bit low according to the link you posted "...a number lower than 100 means it is removing fuel due to a sensed rich condition. Generally speaking, your AFV should be within 10% of 100" I checked the AFV setting as outlined in the Revision Moto post and it's set to 90% (ignore the front number, I only have the rear O2 sensor):
Screenshot_20210225-143518.jpg
So I'm thinking I should set this to 100% (or maybe just over - from https://www.rev-mo.com/openloop: "If it was a stock bike with a stock exhaust we may want to start at 104. This starting point also depends on what your current AFV value, but it should be close to 100"). I am running a K&N air filter but factory exhaust. The bike did have a sportier exhaust on it when I bought it (which I found too loud, hence the stock one now fitted), so maybe the previous owner was messing with settings...
Also on that same page "...Buells have a nasty tendency to develop a lean condition due to inaccurate O2 sensing which shows up as an AFV of less than 100 at or near sea level. In this case, the ECM "thinks" that the motorcycle is going up in altitude, so it is reducing the fuel delivery across the board." - Do you reckon this is what I'm seeing (the engine is sensed to be too rich)? Or simply that the AFV is set too low (90% instead of 100+)?
P.S Having said all the above, since replacing the ignition coil the bike has been running fine, no hiccoughs or pops, pulls nicely through the rev range.