12-28-2017, 02:13 PM
(12-28-2017, 01:35 PM)pdedse_imp Wrote:(12-28-2017, 10:16 AM)SportsterDoc_imp Wrote:(12-28-2017, 06:05 AM)postoak_imp Wrote: SporsterDoc - what about the posters from other countries who had ECU updates that fixed the problem? If that update is available in the U.S, I would think that would be one of the first actions to take.
1. An ECM reflash may only cure some of the issues. It would not correct a loose connection, failed/failing sensor or vacuum leak. There certainly seems to be more than one cause. Also, if the tech doing the reflash also checked the wiring, that may have solved the issue before the reflash.
2. There is no indication, at this time, of an updated ECM program for the USA...even for states not on the left coast.
(12-28-2017, 09:09 AM)736cc_imp Wrote: Rumor has it USA Honda not updating the ecu due to costly E.P.A. re-certifications, but it’s just a rumor
Rumor or no, it is a very likely supposition!
This is my third EFI bike:
The 2012 Triumph Bonneville was prepped with an ECM tune for an Arrow aftermarket exhaust...even though I kept it stock,then later center drilling the mufflers 1/2" to be audible. It ran very well, under all conditions. The factory tune may have caused some hesitation.
The 2016 Moto Guzzi V7II has a new ECM program download at 600 miles, which only slightly helped cold and hot starts. The hot starts were the most irritating. It could be heat saturated, stop to go into a store for 15-30 minutes and it would bog if not allowed to idle for 1/2 a minute. I was suspecting the heated O2 sensors having to re-warm...just a guess. Might have been curable, but an altercation with the dealership owner ended that.
This 2014 CB1100 is flawless...cold or hot. Don't think I want the ECM touched!
(12-27-2017, 05:45 PM)Cormanus_imp Wrote: Thanks to you all for the ongoing work on this issue that has flummoxed a number of members.
Has anyone yet tested for a vacuum leak? If so, what was the result?
Hopefully members are not shy about snugging 8 hose clamps!
Maybe just shy about reporting it?!
Just got back from a ride along Lake Mead up to Overton.
It was a relaxed day.
59.9 MPG going up North Shore at 55 MPH (elevation gain)
60.3 MPG returning via Interstate 15 at 65 MPH (75 MPH zone).
Can't believe I had the patience, but was determined to not give in to bursts of speed!
In the garage, bike went up on centerstand for chain lube (2358 miles)
Not finding any fasteners which needed torquing.
Got into the habit after riding Sportsters and started preaching post-ride inspection.
I find it interesting that some get that kind of mileage on their CB1100. Normal for me was 43mpg, some city, but mostly 45-60 country riding...maybe 49-50 if all hiway. And I don't ride crazy on the throttle.
I've wondered if there might be a correlation between bikes with high/low idle issue and overall lower mpg for those bikes affected.
That was an unusual run. Typical is 46 to 54. When calculating range between fuel stops, I use 48 MPG. 54 is fairly level at 70-75 MPH. 46 is 85 + and pulling some grades...with some speed bursts. Most city riding is on my way out of town.