peterbaron
Road warrior
Very valuable info Enzo 
CB1100 Idle speed instability problem
- Thread starter ericlo69_imp
- Start date
I contacted Honda of America and they informed me that any ECU updates were not authorized for the North American market.Enzofour_imp said:Today the Honda dealer informed me that in 2016 Honda sent dealers an ECU update.
This update was not an official reminder, but a tip to use on 2014/2015 models with low idle and shutdown issues.
On 14/04/2021 they will install this update for me, we will see the effects.
I will try to get the name / code of the firmware for this update.
Meanwhile, with the replacement of the IACV the bike didn't give me any more problems.
Houtman_imp
Road warrior
Thanks Enzo for that useful info , so I never had a problem but you never know.
GoldOxide_imp
Road warrior
I wonder if that would fix the very low idle on the 2014 model after a long, hot day freeway cruise at the first stop. Never stalled (obviously I did not want it too), but it tried and it eventually recovered to normal.
PowerDubs_imp
Road warrior
Dave_imp said:I contacted Honda of America and they informed me that any ECU updates were not authorized for the North American market.Enzofour_imp said:Today the Honda dealer informed me that in 2016 Honda sent dealers an ECU update.
This update was not an official reminder, but a tip to use on 2014/2015 models with low idle and shutdown issues.
On 14/04/2021 they will install this update for me, we will see the effects.
I will try to get the name / code of the firmware for this update.
Meanwhile, with the replacement of the IACV the bike didn't give me any more problems.
Wouldn't stop Don Guhl from copying that file and using it as the base for his tunes.
jeffmazz_imp
First service completed
I haven't had major idle instability issues (stalling, very high idle) but my bike (2014 Standard) will idle up and down from about 800 RPM and 1,200 RPMs after riding for a few miles on a hot day. I'm a two finger clutch guy so when I stop my clutch lever isn't fully compressed to the bar. Yesterday the goofy idle was doing it's thing and I put all fingers on the clutch lever and pulled the lever all the way to the bar......the idle stabilized immediately. I continued the rest of the 2 hour ride alternating between two finger clutching and four finger clutching. The idle is normal with the clutch lever fully compressed to the bar every time. This isn't making sense to me. Any thoughts?
On another note, I noticed that Don Guhl is no longer flashing ECU's for street bikes. I visited his website and it specifically says not to send any ECU's in for re-flashing as they will be returned without any service being performed. I was going to call to see what this is all about. I'm wondering if you simply have to tell them it is for "off road use only" and you're good to go.
On another note, I noticed that Don Guhl is no longer flashing ECU's for street bikes. I visited his website and it specifically says not to send any ECU's in for re-flashing as they will be returned without any service being performed. I was going to call to see what this is all about. I'm wondering if you simply have to tell them it is for "off road use only" and you're good to go.
Lord Popgun
Road warrior
Probable the EPA cracking down. Harley got whacked with $12 million penalty for their “off-road” parts. I think tuners are in the sights now. I’ve seen discussion about this on other sites too.
GoldOxide_imp
Road warrior
I recall a few times off-ramping from a freeway after a long, profuse hot, humid day of riding and coming to the stop light with the idle RPM high (no throttle input). After less than 15 seconds it would settle down to normal idle. The offramp length would be between 500 and 1000 meters and mostly all casual deceleration.
Uncommon and unpredictable when it would happen, except it appeared only on very hot days.
(2014 CB1100)
Uncommon and unpredictable when it would happen, except it appeared only on very hot days.
(2014 CB1100)
I continued the rest of the 2 hour ride alternating between two finger clutching and four finger clutching. The idle is normal with the clutch lever fully compressed to the bar every time. This isn't making sense to me. Any thoughts?
Hi jeffmazz. What does the ide speed do when the engine is in neutral with the clutch disengaged? When my high/low idle condition was occurring on my bike I never checked to see if clutch engagement had any affect. The difference in RPM that you described is exactly how my bike idle issue started. It would come and go randomly, and it eventually got worse to the point where it would stall, of idle as high as 1,600 RPM.
Hi jeffmazz. What does the ide speed do when the engine is in neutral with the clutch disengaged? When my high/low idle condition was occurring on my bike I never checked to see if clutch engagement had any affect. The difference in RPM that you described is exactly how my bike idle issue started. It would come and go randomly, and it eventually got worse to the point where it would stall, of idle as high as 1,600 RPM.
jeffmazz_imp
First service completed
Dave,Dave_imp said:
I haven't tried putting it in neutral and disengaging the clutch. I'll try it next time I go out and report back.
max
Road warrior
Very good observation Jeff, as you can see we are still lost as to why this happens on these 2014 models ( mostly ).
Anything you can find out with regards to hot/cold etc. would help focus our attention to what the software is doing in this case.
Yourself and Dave can bounce things around, in the meantime for your info there is a switch on the clutch handle and it's main function is to enable the engine to start with the clutch dis-engaged ( pulled in ) whilst in gear but you have probably worked that out by now ( and so has the e.c.u. engine controller with it's flukey software )
Thanks for your input .
Anything you can find out with regards to hot/cold etc. would help focus our attention to what the software is doing in this case.
Yourself and Dave can bounce things around, in the meantime for your info there is a switch on the clutch handle and it's main function is to enable the engine to start with the clutch dis-engaged ( pulled in ) whilst in gear but you have probably worked that out by now ( and so has the e.c.u. engine controller with it's flukey software )
Thanks for your input .
jeffmazz_imp
First service completed
I was finally able to get the bike out today and it did the famous idle instability thing after it got warmed up enough. Dave asked what the idle does when I go to neutral and disengage the clutch. The idle stabilizes just as it does when I fully compress the clutch lever to the bar. I have only experienced the high idle (1,600 RPM) once when the bike had under 1,000 miles. It was a very hot day and it hasn't done it since. I've never had the bike stall during it's idle fit but it does vary quite a bit (500 - 600 rpm's) when it starts acting up. It is weird that fully compressing the clutch or going to neutral calms it down.
tod.branko_imp
Been there
Have you had your clutch serviced? Warped plates, faulty springs? Does your rear wheel creep on the center stand in neutral?jeffmazz_imp said:
'14 CB1100 STD 5 speed
jeffmazz_imp
First service completed
Have you had your clutch serviced? Warped plates, faulty springs? Does your rear wheel creep on the center stand in neutral?tod.branko_imp said:
'14 CB1100 STD 5 speed
Clutch is fine. When sitting in gear with the clutch disengaged with my two fingers the clutch lever will move out approx. 1/2" before engaging so it is completely disengaging.
syncronizator_imp
Running like a top
Just for reporting purpse.
Idle problem seems to be solved until now. I have traveled 28tkm since replacing the IACV. The problem never recurred. Now my CB1100 has 58tkm on clock.
Idle problem seems to be solved until now. I have traveled 28tkm since replacing the IACV. The problem never recurred. Now my CB1100 has 58tkm on clock.
max
Road warrior
That's the kind of news we like, thanks for the update.
the Ferret
Road warrior
Good deal sync
Nachodaddy
Road warrior
Here we go again.
I bought my 2013 standard in August, 2021 with around 4500 miles on it. A very clean bike that looked well cared for. I don't ride much, but recently the idle will suddenly drop to around 500 RPM and the engine will die. This first happened when I was riding very slowly, using the clutch to regulate my speed while practicing very slow speed turns, figure-eights and U-turns in an empty parking lot. Then it happened after riding fairly fast and stopping at a traffic light. Clutch pulled in, bike in 1st gear, engine idles down to 500 for a second or so and dies. This happened a few more times on the way home. The bike is hard to start when this happens. Enough so, that other traffic is getting irritated with me and I have no place to move the bike, but have to keep trying.
I will take it out and see if a few things help, like putting it in neutral and leaving the clutch out when I start it, turning off and on the master switch before starting it after it dies, and rotating the throttle completely each time.
I think it is too old for Honda to give me any kind of warranty coverage and I have absolutely no confidence in any of the local "Honda" shops.
Weather at this time is very mild - sixties to mid-seventies (F) dry air, typical desert winter weather. I very much appreciate all the posts, attachments and pictures others have posted of their experiences with this problem. If I had been smart enough to read this forum before buying this bike, I would not have bought it, especially at the price I paid.
I bought my 2013 standard in August, 2021 with around 4500 miles on it. A very clean bike that looked well cared for. I don't ride much, but recently the idle will suddenly drop to around 500 RPM and the engine will die. This first happened when I was riding very slowly, using the clutch to regulate my speed while practicing very slow speed turns, figure-eights and U-turns in an empty parking lot. Then it happened after riding fairly fast and stopping at a traffic light. Clutch pulled in, bike in 1st gear, engine idles down to 500 for a second or so and dies. This happened a few more times on the way home. The bike is hard to start when this happens. Enough so, that other traffic is getting irritated with me and I have no place to move the bike, but have to keep trying.
I will take it out and see if a few things help, like putting it in neutral and leaving the clutch out when I start it, turning off and on the master switch before starting it after it dies, and rotating the throttle completely each time.
I think it is too old for Honda to give me any kind of warranty coverage and I have absolutely no confidence in any of the local "Honda" shops.
Weather at this time is very mild - sixties to mid-seventies (F) dry air, typical desert winter weather. I very much appreciate all the posts, attachments and pictures others have posted of their experiences with this problem. If I had been smart enough to read this forum before buying this bike, I would not have bought it, especially at the price I paid.
max
Road warrior
Would think we are all sorry to hear this bad news Nacho, as for research you would have read that the majority of cases by far is on the 2014 models with very few exceptions.
So you could have drawn the conclusion we all have that the rest of the years are unaffected and safe to buy.
We only know this from experience and although i stated that the permanent magnets in some parts seem to be affected ( by lack of other evidence ) that is just my opinion and i would like to point out that a software update has also been known to repair this issue permanently with the same affected iacv in place as reported by several members in different countries.
On the other hand this is actually the only ( but unfortunate ) fault typical for this bike which is not a bad score overall.
On a happier note; where would you be without the assistance of the forum by Guth and co ( thanks gents! ).....
Yes it would be interesting to have more tests like you want to do, who knows what we might find, thanks for posting.
So you could have drawn the conclusion we all have that the rest of the years are unaffected and safe to buy.
We only know this from experience and although i stated that the permanent magnets in some parts seem to be affected ( by lack of other evidence ) that is just my opinion and i would like to point out that a software update has also been known to repair this issue permanently with the same affected iacv in place as reported by several members in different countries.
On the other hand this is actually the only ( but unfortunate ) fault typical for this bike which is not a bad score overall.
On a happier note; where would you be without the assistance of the forum by Guth and co ( thanks gents! ).....
Yes it would be interesting to have more tests like you want to do, who knows what we might find, thanks for posting.
Nachodaddy, that’s a bummer for you. I can’t recall another 2013 reporting this problem and, even amongst the 2014 bikes, it’s rare. I hope you’re able to add to what we know about this issue. Otherwise, replace the IACV and it should be fine.
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