CB1100 Idle speed instability problem

[Lord Popgun]

You might try the TPS reset. Here is a link. Read the post and at least a few posts down too. Seems to work for some people, somewhat at least.

There are also more thread on this problem. You might search around for them if you haven't already.

[ericlo69_imp]

Update:
Here in Taiwan, recently HONDA released new (revised) ECU program to solve CB1100 idle speed problem; some owners start to send their bikes to dealer side for new ECU program uploading. (BUT there is not RECALL from HONDA Taiwan dealers). One owner mentioned that his bike (EX model, Throttle body assy has been replaced before because of idle speed unstable) is getting smoother and more powerful after uploading.
Just for your reference, and I will keep it updated.

This owner just said that idle speed problem happened again after new ECU program upload, it seems THIS "new" ECU program is not the right one for problem solving!?
BTW, another owner (14' EX model, this case has been mentioned in my previous posts #31,84) suffered this problem seriously for a long time; few weeks ago HONDA technician replaced the whole ECU (not cheap). he said: improve significantly & so far so good, but need to keep testing.

[beardyweirdy@me.com_imp]

Thanks Ericlo69,
Interesting to hear. I'm curious as to what the ECU upload is actually changing?

I've had the ECU software uploaded and I have to say, It's been better since.
I've ridden it in exactly the same conditions, in the same way, as I did previously when it would throw up the problem and it's been as good as gold.

If the problem returns to my bike I'll post it up, straight away...

On the forum your quoting from, is it just '14 EX models that are effected?

[JustCruising_imp]

Thanks Ericlo69,
Interesting to hear. I'm curious as to what the ECU upload is actually changing?

I've had the ECU software uploaded and I have to say, It's been better since.
I've ridden it in exactly the same conditions, in the same way, as I did previously when it would throw up the problem and it's been as good as gold.

If the problem returns to my bike I'll post it up, straight away...

On the forum your quoting from, is it just '14 EX models that are effected?

Hi beardyweirdy

I think I read earlier in this or a similar thread that you spoke with Honda UK directly regarding this. Did you get a name of the person you spoke with by any chance ? My bike is off for it's first service soon and I'd like to pre advise my dealership with as much info as I can (although not suffered any of these idle problems to date).

Cheers

[ericlo69_imp]

Thanks Ericlo69,
Interesting to hear. I'm curious as to what the ECU upload is actually changing?

I've had the ECU software uploaded and I have to say, It's been better since.
I've ridden it in exactly the same conditions, in the same way, as I did previously when it would throw up the problem and it's been as good as gold.

If the problem returns to my bike I'll post it up, straight away...

On the forum your quoting from, is it just '14 EX models that are effected?

Mostly 14'~15' EX model.

[dave]

Here is my latest update concerning my letter to Honda (sorry for the delay, I've been busy). Finally talked to a Honda representative two weeks ago, in response to the certified letter I sent them; I am extremely disappointed in their response. It sounded like I was talking to some third-party representative of Honda because of the answer I received, and this answer was repeated back to me at least five or six times during our conversation. This answer was "We have no knowledge of any recalls or service bulletins applicable to this motorcycle". We talked for at least ten minutes, and every time I asked why Honda was unable to repair my motorcycle I got the same answer. When I asked why this repair was being offered in the UK, I got this answer. When I asked why Honda was offering this repair in Taiwan, I got this answer. When I explained how many owners in the States are experiencing the same problems that owners in the UK and Taiwan are experiencing I got the same answer. I included the address of this forum in my letter to Honda, along with a couple of snapshots of member's comments, and the representative informed me that she had visited this forum and read the postings. I asked if the repairs that were applied in the UK and Taiwan could be applied to my bike I was told that due to California emissions regulations a repair authorized for the UK or Taiwan could not "legally" be performed here, followed by their standard answer above. I tried to reason with the Honda representative by explaining that I, and other owners in the States are having an identical problem, which would indicate a (fairly) widespread problem, and I received the same, standard answer above. I don't know what it will take for Honda to acknowledge a manufacturing defect exists on these bikes in the States, and to repair it, but I informed the Honda representative that I would pursue legal action under my Lemon Law rights, if I have to. Maybe if enough of us with the same problem all contact American Honda then we can convince them to take action? As I stated above, it was almost like I wasn't talking to a Honda representative because the answers I was receiving were meaningless, almost like when you're connected to somebody from India when you call to make a complaint about your credit card billing. I am supplying the contact information at Honda below. Any of you guys experiencing the high/low/stalling problems, I urge you to call this number and let them know.
Kelly (at Honda).
866-784-1870 extension 13810.

[Lord Popgun]

Paragraphs. They're a thing.

I don't understand the California emissions thing. Aren't the Euro standards just as strict?

[flynrider]

Paragraphs. They're a thing.

I don't understand the California emissions thing. Aren't the Euro standards just as strict?

Current Euro4 standards for tailpipe emissions are more strict than current CARB and US EPA standards. I think the problem lies in that the various regulatory bodies each have their own sets of requirements (beyond tailpipe emissions) that they require manufacturers to meet. These often involve slightly different equipment and ECU programming from region to region.

While it may make little practical difference, installing ECU programming from another region would probably violate rules under which the bikes were originally certified.

[ClassicVW_imp]

Paragraphs. They're a thing.

I don't understand the California emissions thing. Aren't the Euro standards just as strict?

I didn't have any problem following along. You should be thanking him for his efforts rather than giving him a writing critique.

[johnf514_imp]

Gone for two weeks on honeymoon and this thread has updated significantly.

Magnus, thanks for all the hard work and details on the tear down. Did you reset the ECU after replacing the IACV?

Dave, sorry to hear about Honda's response. It does sound like you're working with a third party. Any chance you can get the bike to dealer (if you didn't already)? Are you still under warranty? I'll call Kelly and leave my experience with her.