CB1100 Idle speed instability problem

[Cormanus]

G'day Anders and welcome to the forum. Thanks for adding to our store of information on this issue. Your English is excellent and we'd like to hear more from you about your bike and your experiences with it. We once had another member in Denmark, but he's not signed in for a while.

[AndersL_imp]

G'day Anders and welcome to the forum. Thanks for adding to our store of information on this issue. Your English is excellent and we'd like to hear more from you about your bike and your experiences with it. We once had another member in Denmark, but he's not signed in for a while.

Thanks Cormanus, this is a great forum with tons of information. This bike is very seldom seen in Denmark (only a handful I guess) because it was never sold by Honda in Denmark. Mine is a demo imported from Germany.

[GoldOxide_imp]

Welcome to the Forum Anders. Glad to learn your idle problem was resolved. Great warranty - extended warranty? Don't get that as standard in Canada. When not elsewhere, you will be here.

[zirconxi_imp]

Bikes at 33500km mileage, rode for 6 hours under hot weather last Saturday, while returning home the bike suddenly gone into high idling while waiting at traffic lights to turn into my housing area. 1st time it happen. Stop engine and restart doesn't solve it. unplug and plug back EOT then she return to normal (I had my finger burned trying to do this).

Trying to find the cause online and end up reading 61 pages in this tread for the past 3 days (not giving up yet, will continue again). From what I have read, it seems like this problems can be from multiple fault, but all giving same symptom. hence some method works while some don't. Anyway, i updated the spreadsheet with my details (I deleted some lines which are empty without any data. i double triple check and its all empty row. hope i didn't delete the wrong thing.). hoping others can find their solutions.

My friend's CB have the idling too slow and engine stalled problem as well before this, but he solved his by spraying something into throttle body, to clean it he say...

[pdedse]

Bikes at 33500km mileage, rode for 6 hours under hot weather last Saturday, while returning home the bike suddenly gone into high idling while waiting at traffic lights to turn into my housing area. 1st time it happen. Stop engine and restart doesn't solve it. unplug and plug back EOT then she return to normal (I had my finger burned trying to do this).

Trying to find the cause online and end up reading 61 pages in this tread for the past 3 days (not giving up yet, will continue again). From what I have read, it seems like this problems can be from multiple fault, but all giving same symptom. hence some method works while some don't. Anyway, i updated the spreadsheet with my details (I deleted some lines which are empty without any data. i double triple check and its all empty row. hope i didn't delete the wrong thing.). hoping others can find their solutions.

My friend's CB have the idling too slow and engine stalled problem as well before this, but he solved his by spraying something into throttle body, to clean it he say...

zirconxi, as one who had high/low idle issue, sorry to hear your bike is acting up.

I think it was SportsterDoc who came up with a trouble-shooting list of where to start from simple to more complex possible causes--I searched but couldn't find it. Dave in San Diego outlines the more complex fix--the IACV.

[Riko_imp]

Bikes at 33500km mileage, rode for 6 hours under hot weather last Saturday, while returning home the bike suddenly gone into high idling while waiting at traffic lights to turn into my housing area. 1st time it happen. Stop engine and restart doesn't solve it. unplug and plug back EOT then she return to normal (I had my finger burned trying to do this).

Trying to find the cause online and end up reading 61 pages in this tread for the past 3 days (not giving up yet, will continue again). From what I have read, it seems like this problems can be from multiple fault, but all giving same symptom. hence some method works while some don't. Anyway, i updated the spreadsheet with my details (I deleted some lines which are empty without any data. i double triple check and its all empty row. hope i didn't delete the wrong thing.). hoping others can find their solutions.

My friend's CB have the idling too slow and engine stalled problem as well before this, but he solved his by spraying something into throttle body, to clean it he say...

zirconxi, as one who had high/low idle issue, sorry to hear your bike is acting up.

I think it was SportsterDoc who came up with a trouble-shooting list of where to start from simple to more complex possible causes--I searched but couldn't find it. Dave in San Diego outlines the more complex fix--the IACV.

zirconxi, as one who had high/low idle issue, sorry to hear your bike is acting up.

I think it was SportsterDoc who came up with a trouble-shooting list of where to start from simple to more complex possible causes--I searched but couldn't find it. Dave in San Diego outlines the more complex fix--the IACV.
did I miss something? but there isn't a fix, still remains a mystery what the cause is, let alone what the solution is

My low idling stalling was not fixed, but resolved by replacing the whole throttle body under warranty luckily.
Thats no fix, thats guessing and hoping for the best, and it worked out.

I doubt the IACV is the cause and the solution for the idling issues.

As of today, Honda has not recognized it as a big enough issue to organize a recall on particular models of the CB1100.

[zirconxi_imp]

Bikes at 33500km mileage, rode for 6 hours under hot weather last Saturday, while returning home the bike suddenly gone into high idling while waiting at traffic lights to turn into my housing area. 1st time it happen. Stop engine and restart doesn't solve it. unplug and plug back EOT then she return to normal (I had my finger burned trying to do this).

Trying to find the cause online and end up reading 61 pages in this tread for the past 3 days (not giving up yet, will continue again). From what I have read, it seems like this problems can be from multiple fault, but all giving same symptom. hence some method works while some don't. Anyway, i updated the spreadsheet with my details (I deleted some lines which are empty without any data. i double triple check and its all empty row. hope i didn't delete the wrong thing.). hoping others can find their solutions.

My friend's CB have the idling too slow and engine stalled problem as well before this, but he solved his by spraying something into throttle body, to clean it he say...

zirconxi, as one who had high/low idle issue, sorry to hear your bike is acting up.

I think it was SportsterDoc who came up with a trouble-shooting list of where to start from simple to more complex possible causes--I searched but couldn't find it. Dave in San Diego outlines the more complex fix--the IACV.

zirconxi, as one who had high/low idle issue, sorry to hear your bike is acting up.

I think it was SportsterDoc who came up with a trouble-shooting list of where to start from simple to more complex possible causes--I searched but couldn't find it. Dave in San Diego outlines the more complex fix--the IACV.
did I miss something? but there isn't a fix, still remains a mystery what the cause is, let alone what the solution is

My low idling stalling was not fixed, but resolved by replacing the whole throttle body under warranty luckily.
Thats no fix, thats guessing and hoping for the best, and it worked out.

I doubt the IACV is the cause and the solution for the idling issues.

As of today, Honda has not recognized it as a big enough issue to organize a recall on particular models of the CB1100.

I think there are multiple causes thus multiple solutions. All these are different problems but will show the same symptom. Some are electronics/electrical (Sensors, contacts, wiring, battery), some software (corrupt data, firmware corrupt, error in program), some hardware (IACV, Throttle body, dirt, sticky pin, electrical motor, vacuum leak), some mixture of a few, some other unknown. I think Honda wouldn't issue a recall if there is not a specific design fault that cause the same problem.

[Riko_imp]

Bikes at 33500km mileage, rode for 6 hours under hot weather last Saturday, while returning home the bike suddenly gone into high idling while waiting at traffic lights to turn into my housing area. 1st time it happen. Stop engine and restart doesn't solve it. unplug and plug back EOT then she return to normal (I had my finger burned trying to do this).

Trying to find the cause online and end up reading 61 pages in this tread for the past 3 days (not giving up yet, will continue again). From what I have read, it seems like this problems can be from multiple fault, but all giving same symptom. hence some method works while some don't. Anyway, i updated the spreadsheet with my details (I deleted some lines which are empty without any data. i double triple check and its all empty row. hope i didn't delete the wrong thing.). hoping others can find their solutions.

My friend's CB have the idling too slow and engine stalled problem as well before this, but he solved his by spraying something into throttle body, to clean it he say...

zirconxi, as one who had high/low idle issue, sorry to hear your bike is acting up.

I think it was SportsterDoc who came up with a trouble-shooting list of where to start from simple to more complex possible causes--I searched but couldn't find it. Dave in San Diego outlines the more complex fix--the IACV.

zirconxi, as one who had high/low idle issue, sorry to hear your bike is acting up.

I think it was SportsterDoc who came up with a trouble-shooting list of where to start from simple to more complex possible causes--I searched but couldn't find it. Dave in San Diego outlines the more complex fix--the IACV.
did I miss something? but there isn't a fix, still remains a mystery what the cause is, let alone what the solution is

My low idling stalling was not fixed, but resolved by replacing the whole throttle body under warranty luckily.
Thats no fix, thats guessing and hoping for the best, and it worked out.

I doubt the IACV is the cause and the solution for the idling issues.

As of today, Honda has not recognized it as a big enough issue to organize a recall on particular models of the CB1100.

I think there are multiple causes thus multiple solutions. All these are different problems but will show the same symptom. Some are electronics/electrical (Sensors, contacts, wiring, battery), some software (corrupt data, firmware corrupt, error in program), some hardware (IACV, Throttle body, dirt, sticky pin, electrical motor, vacuum leak), some mixture of a few, some other unknown. I think Honda wouldn't issue a recall if there is not a specific design fault that cause the same problem.

One thing is know for sure, nobody knows anything really.

Again, all speculation from our side.

[GoldOxide_imp]

Had an Aprilia that would sometimes unexpectedly slip into low rough running or rough idle. The root cause of a wiring harness connector above the engine that would experience impaired connectivity. I suspect it has something to do with vibration and/or expansion from engine heat. Nevertheless, compressing the connector (and re-seating each conductor) and holding it tightly with a tie-wrap stopped the problem.

- - -

Mentioned many times throughout the Forum, however, wiring/connector issues owns a lion's share of rider pains.

[pdedse]

Bikes at 33500km mileage, rode for 6 hours under hot weather last Saturday, while returning home the bike suddenly gone into high idling while waiting at traffic lights to turn into my housing area. 1st time it happen. Stop engine and restart doesn't solve it. unplug and plug back EOT then she return to normal (I had my finger burned trying to do this).

Trying to find the cause online and end up reading 61 pages in this tread for the past 3 days (not giving up yet, will continue again). From what I have read, it seems like this problems can be from multiple fault, but all giving same symptom. hence some method works while some don't. Anyway, i updated the spreadsheet with my details (I deleted some lines which are empty without any data. i double triple check and its all empty row. hope i didn't delete the wrong thing.). hoping others can find their solutions.

My friend's CB have the idling too slow and engine stalled problem as well before this, but he solved his by spraying something into throttle body, to clean it he say...

zirconxi, as one who had high/low idle issue, sorry to hear your bike is acting up.

I think it was SportsterDoc who came up with a trouble-shooting list of where to start from simple to more complex possible causes--I searched but couldn't find it. Dave in San Diego outlines the more complex fix--the IACV.

zirconxi, as one who had high/low idle issue, sorry to hear your bike is acting up.

I think it was SportsterDoc who came up with a trouble-shooting list of where to start from simple to more complex possible causes--I searched but couldn't find it. Dave in San Diego outlines the more complex fix--the IACV.
did I miss something? but there isn't a fix, still remains a mystery what the cause is, let alone what the solution is

My low idling stalling was not fixed, but resolved by replacing the whole throttle body under warranty luckily.
Thats no fix, thats guessing and hoping for the best, and it worked out.

I doubt the IACV is the cause and the solution for the idling issues.

As of today, Honda has not recognized it as a big enough issue to organize a recall on particular models of the CB1100.

I think there are multiple causes thus multiple solutions. All these are different problems but will show the same symptom. Some are electronics/electrical (Sensors, contacts, wiring, battery), some software (corrupt data, firmware corrupt, error in program), some hardware (IACV, Throttle body, dirt, sticky pin, electrical motor, vacuum leak), some mixture of a few, some other unknown. I think Honda wouldn't issue a recall if there is not a specific design fault that cause the same problem.

One thing is know for sure, nobody knows anything really.

Again, all speculation from our side.

I think your statement "nobody knows anything" goes too far. Perhaps we're not sure why the IACV failed for several owners, but it does seem to be a main "suspect". Dave reported in this thread how and why he replaced the IACV. Problem did not return. I forget the name of another owner who had his replaced under warranty, problem did not return. Your throttle body was replaced--which the IACV is part of (I think, correct me here if I'm mistaken) and the problem didn't return for you (or did it? IIRC, you sold the bike).

Some have reported doing things other than IACV replacement and the problem did not return, while others have tried the same things that "worked" for some...only to find that such fixes didn't work. I myself tried several things with no apparent luck; but after cleaning the TPI connections the bike was free of high/low issues for a number of weeks at which time I traded-in the bike. Was it fixed? I don't know...that was during winter and maybe the colder temps dampened the problem.

Again, correct me if I'm mistaken, but I remember reading in the forums that the part number for the IACV for years 2014 and prior is different than part number for IACV for '17EX models. The different part number might mean that Honda DOES know something and they did a fix--hence, new part number...but they aren't telling us.