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CB1100 Idle speed instability problem
(08-26-2017, 01:44 PM)pdedse_imp Wrote: Well, not sure what to think...haven't had any issues with the bike till today. Went for a 90 mile ride late afternoon with 90+ temp through rolling hills, not many stops, idle fine till about 1.5 hours into the ride. Stopped to get something to drink and the idle fell to about 550-600 and bike seemed as if it were going to die, but didn't. I have not had this issue, only the high idle. I let the bike idle and watched as the needle slowly crept back up to 1000, where it stayed. I let the bike cool for half an hour. Did the throttle reset sequence. Bike idle was right at 1000. Rode another half hour home where idle again dipped to 550, but rose to 1000 in less than 5 seconds and it idled fine at that point. Not sure if that happens for others at any time, but it's (the low idle) the first time it happened for me. Bike runs fine otherwise, no high idle.

I always thought, that my CB is only a candidate for high idleing. I'm wrong. Since some weeks I know better and out of nowherer, my Honda sometimes behaves like you deschribe it in your post. The idle falls down and then slowly ceeps back to round 1.000 revs. Til this phenomena disappears and reoccurres. Seems like the low idleing is a substitute for the high. I noticed it a few times on my tour in the UK. If I shall give an explanation for it, I'm not a CB doctor, my theory is as follows: some CBs fall into a high idle, if they feel that they are not warmed up enough even after enough miles for doing so. The same the other way round, they lower the idle, if they gain the impression of getting to warm. Riding a while with low speeds in a more kind of stop and go traffic offers me this low idle thing. Seems, that the CB tries to prevent overheating.

Wisedrum
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(08-26-2017, 06:47 PM)Riko_imp Wrote: Have you blipped the trottle while it was at low idle?

Thats when it could stall...

I did about 3 times in a row because I thought it was going to stall, but it didn't.
(08-26-2017, 08:06 PM)Wisedrum_imp Wrote:
(08-26-2017, 01:44 PM)pdedse_imp Wrote: Well, not sure what to think...haven't had any issues with the bike till today. Went for a 90 mile ride late afternoon with 90+ temp through rolling hills, not many stops, idle fine till about 1.5 hours into the ride. Stopped to get something to drink and the idle fell to about 550-600 and bike seemed as if it were going to die, but didn't. I have not had this issue, only the high idle. I let the bike idle and watched as the needle slowly crept back up to 1000, where it stayed. I let the bike cool for half an hour. Did the throttle reset sequence. Bike idle was right at 1000. Rode another half hour home where idle again dipped to 550, but rose to 1000 in less than 5 seconds and it idled fine at that point. Not sure if that happens for others at any time, but it's (the low idle) the first time it happened for me. Bike runs fine otherwise, no high idle.

I always thought, that my CB is only a candidate for high idleing. I'm wrong. Since some weeks I know better and out of nowherer, my Honda sometimes behaves like you deschribe it in your post. The idle falls down and then slowly ceeps back to round 1.000 revs. Til this phenomena disappears and reoccurres. Seems like the low idleing is a substitute for the high. I noticed it a few times on my tour in the UK. If I shall give an explanation for it, I'm not a CB doctor, my theory is as follows: some CBs fall into a high idle, if they feel that they are not warmed up enough even after enough miles for doing so. The same the other way round, they lower the idle, if they gain the impression of getting to warm. Riding a while with low speeds in a more kind of stop and go traffic offers me this low idle thing. Seems, that the CB tries to prevent overheating.

Wisedrum

My initial problem with the high idle seems to have gone away after throttle reset, sea foam, and WOT riding. The low idle happened yesterday for the first time. The common riding characteristic that seems to have triggered both instances was riding for over an hour--but not stop and go traffic, rather I was in the countryside at speeds of 40-60mph with few stops. The first instance with the high idle was an 80 degree day, yesterday was slightly over 90.

I'll probably live with it for a while to see if it acts up consistently and to see if cooler weather brings about fewer issues. My attempt here is to document what happens over time, try any possible fixes without breaking the bank.
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This whole idle thing is funny.
The high idle thing seems to have gone, I don't swear on it. After my tour I rode today 120km on country roads. The engine wasn't too warm. After half of the trip the Honda started to only idle at 500-600revs whenever I released the throttle and then creeped up very slowly. Sometimes the engine stopped. To avoid it, I kept the CB in mood for idleing by hand gas..... After a 20minute rest, I also did the calibration thing, I started the engine and the problem was gone til I arrived home. Very strange and I'm far away from seeing any independences .... I just recognize... but besides of this mystery the Honda runs and performs well.

Wisedrum
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It's fun trying to make it happen when it won't. Tonight I thought I'd try a cool evening, hiway ride and expected the bike to behave, and it did. I did the throttle reset once again, added another 4oz seafoam (third tank w/ foam since high idle developed) and idle settled right in at 1000 once it was warmed up (within a mile). 25 miles of mostly hiway riding at 60-80mph, then 4-5 miles home on city streets and no idle problems neither high nor low.

This issue aside, at 9400 miles, this is still a fun bike to ride. It's taken me awhile to get used to its low key muffler, but now I like it fine. I've got all fall, winter and spring to fiddle with this, talk to dealer, and generally just see how it's going to play out for a number of months. Next summer, I hope to be riding it for another OR to mid-west trip, idle problems or no.
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My fingers were crossed that maybe the low idle had fixed itself...ha!! Went for a nice long 290 mile ride today. At about08 miles into the ride, the low idle issue came back, and the new baseline became around 650-700rpm. Never stalling. At 115 miles, stopped for gas and did the throttle reset. Bike sat 15 minutes for a coffee break and for the next 160 miles, no issues at all, steady at 1000 for every stop. Daytime temps around 80, mostly hiway riding, but a good 15-20 miles in slow moving traffic as well. Mischevious bike it is. Will probably try a battery disconnect next, and test to see its strength...seem to recall some thinking low battery could be a trigger. On the bright side, no return to the high idle of 1500 since it went away.
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Hi, all cb1100 fan

check this, [url=http://cb1100forum.com/forum/showthread.php?tid=7898&page=10]http://cb1100forum.com/forum/showthread....98&page=10

after that till now 46,000 km. i'm enjoy love to ride and happy.
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(08-30-2017, 11:43 PM)tory_imp Wrote: Hi, all cb1100 fan

check this, [url=http://cb1100forum.com/forum/showthread.php?tid=7898&page=10]http://cb1100forum.com/forum/showthread....98&page=10

after that till now 46,000 km. i'm enjoy love to ride and happy.

I read that Tory, thanks. But I also recall what Johnf514 wrote:

"Hi Tory, Dave. I caution you both on the ECU reset/reflash. I had this done three (3) times and the high idle condition returned. It was only after the dealership replaced the idle air control valve motor that the issue was (hopefully) resolved."

I guess I'm trying the no cost possibilities first--my bike is out of warranty--and then I'll visit dealer if I have to.
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Just thought I'd check in. My bike continues to idle perfectly. I really wish I knew what caused the high idle. It is interesting that it happened right before the end of the original equipment battery life. I'd try to pin it on that but I can't because the issue was 'cured' while I was still running that battery. Installing the new battery had no effect on the idle either way.

After all this I have decided that injector cleaner will be used occasionally.
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(08-31-2017, 07:12 AM)pdedse_imp Wrote:
(08-30-2017, 11:43 PM)tory_imp Wrote: Hi, all cb1100 fan

check this, [url=http://cb1100forum.com/forum/showthread.php?tid=7898&page=10]http://cb1100forum.com/forum/showthread....98&page=10

after that till now 46,000 km. i'm enjoy love to ride and happy.

I read that Tory, thanks. But I also recall what Johnf514 wrote:

"Hi Tory, Dave. I caution you both on the ECU reset/reflash. I had this done three (3) times and the high idle condition returned. It was only after the dealership replaced the idle air control valve motor that the issue was (hopefully) resolved."

I guess I'm trying the no cost possibilities first--my bike is out of warranty--and then I'll visit dealer if I have to.

I read that Tory, thanks. But I also recall what Johnf514 wrote:

"Hi Tory, Dave. I caution you both on the ECU reset/reflash. I had this done three (3) times and the high idle condition returned. It was only after the dealership replaced the idle air control valve motor that the issue was (hopefully) resolved."

I guess I'm trying the no cost possibilities first--my bike is out of warranty--and then I'll visit dealer if I have to. Hi,Pedese
i think my bike not only reset ECU but they changed some parameter.

Sent from my GT-I9500 using Tapatalk
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Hey guys,

Add me to this list... US 2014 STD. 8800 miles, arrow slipon, TSR funnel air kit, PCV

NJ/NY state rides. Yesterday I rode for about an hour, mostly highway, some highway with a lot of lights and stops.

Hit a part of traffic and it sounded like there was a harley behind me, but it was my bike with low RPM almost coughing. I blipped and it died. I pulled to the side, turned off key, turned back on and it started. Went a few mile and stopped at Home Depot and as I was slowing down it stalled again. Waited 15 min and it started again. Back on highway was fine and at a light stalled again. Didnt want to start until i waiting a few min. Then was going 30mph and it stalled. I help the clutch to try to roll home. Wouldnt start after that. Walked it home

Today I TPS reset and went for a ride and ran perfectly. I will post back if it comes back... but lost a lot of trust in my bike.
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