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Help! I've got a 2014 CTX 1300, out of the blue, the idle speed has increased to 2500 rpm even when the engine is fully warmed up. I replaced the IACV valve motor, still no change. Has anyone ever experienced this? If so what did you do to solve it.
Normal idle for a warm engine is 1000rpm, when cold it runs at 2000 for about a minute, but then it drops to 1000. That is the way it is supposed to work. Please help me fix this. Could it be bad gas? vaccuumn hose leak?? I am going to replace gas and check hoses. I have the full service manual, but it does not address this problem nor trouble shoot it.
Please give me your thoughts, THANK YOU
 

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High idle would indicate a Vaccum Leak making the motor lean. Have you checked the Throttle Cables? These have a Push/Pull Cable setup maybe one of the cables has frayed. Try disconnecting the Battery for 20 minutes, this may reset the ECM back to factory parameters if is has some Electronic Brain Fart. GOOD LUCK!
 
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I missed it WELCOME!!!!!!!!! I'm sure more will chime in on your dilemma. :smiley-happy0034:
 

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Thank you Michael I will do as you say, and let you know what happens! Very kind to answer so quick! I hope you have great upcoming holiday-Pat, in Louisville KY
 

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High idle solution!

Thank you Michael I will do as you say, and let you know what happens! Very kind to answer so quick! I hope you have great upcoming holiday-Pat, in Louisville KY
You only get to ask for help if after a solution is found you then inform the group of the solution. That way we all benefit and it encourages other to help or continue to help. :confused: :350x700px-LL-66dd6d
 

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He hasn't shown being logged in since Dec 6, 2016.....
 

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So I just experienced the all-of-a-sudden high idle. I did a 20 minute in town rush hour traffic ride, parked it for an hour, then another 20 minute in town ride and parked it for 2 hours. Starting it up after the 2 hour parking, it stayed a little over 2000 rpm almost the whole way home, which was another 20 minutes. It got down to about 1200-1500 rpm by the time I shut it down. The next time I start it was this morning ( a couple days after the last ride when it happened) and it hung at 2000 rpm again for 10 minutes. I tried lugging the engine down to 1000 rpm (downhill, not under load), then I did some spirited bursts and by the next stop light it had gone down to 1200. By the next light, it was normal at 1000 for the rest of the commute.

Since it finally settled to a stable 1000 rpm, I am ruling out a vacuum leak. If it does it on the way home, I'll try disconnecting the battery to reset the ECU etc. Go figure that only a day before I was telling a carbureted biker friend how glad I was to have fuel injection. :350x700px-LL-66dd6d

I'll keep you posted
 

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I have no experience with this specific problem, but the problem may be temperature related. That would include a possible vacuume leak that seals itself when the rubber hose gets hot. Check it again after it is fully cold. If it is temp related that’s an important clue.
 

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Update: The high idle issue sorted itself out. Must have been an electronic fart. I rode the bike home last night with similar traffic and 2 one hour stops along the way and also commuted to work this morning and it was perfect at idle. I'll take it.
 

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My prayers have been heard ;)
 
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hey, I resemble that remark. E10 is almost all I can find around here that's easy to get. So I get the top tier E10 from Costco and have NO fuel related issues and good mpg to boot. :D
 

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Had high warm up idle rpm after having Battery Tender hooked up for 4 days. ECU is somehow being affected. Battery power is cut off to ECU pin A4 with ignition switch off buI believe it has power constantly from another pin in order to keep memory. I've traced wire diagram but can't see the path.There is a bat back fuse which may be the path to ECM memory. Leaving battery tender off the system is back to normal. Happy motoring.
 

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Had high warm up idle rpm after having Battery Tender hooked up for 4 days. ECU is somehow being affected. Battery power is cut off to ECU pin A4 with ignition switch off buI believe it has power constantly from another pin in order to keep memory. I've traced wire diagram but can't see the path.There is a bat back fuse which may be the path to ECM memory. Leaving battery tender off the system is back to normal. Happy motoring.

My CTX has been on battery tender since October 2015, never had such issue...
 

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I too have all my machines on battery tenders that I don’t use regularly such as both bikes and my lawn tractor with no problems as specified above.
 

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Of course this is an old thread and I have not been on this site in a while.

Having said that, I had this problem at about 6,000 miles. After some research online, I learned this can be caused by bad spark plugs. Changed to iridium plugs and, voila, no more fast idle. Idle instantly went back to normal where it has remained. Cheers!
 

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I had this problem several times. idle at 2000 rpm
two year ago the problems dissapeared after a few week (i thought bad gas?)
But this spring the problem came on again.
Just like Lynn Jackson, in a desperate move I changed the spark plugs to Iridium spark plugs.
Problem solved. engine runs very smoothly now. idle is at around 1000 rpm.
 

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Well, the high idle reappeared new year's eve. I fired it up to leave work a little early and I immediately took off without any warm up. At all stops on my 18 mile journey home, the bike idled at 2000 rpm. It was 3 years ago when it happened before. Same high idle on my way to work this morning. I know, my bad for waiting 5 days to ride in the new year when the weather has been nice most of that time...geez. When coming home, the idle was back to normal. I use standard NGK plugs, which I replaced 9,000 ago. Still a mystery. @bruceb , did you ever find out the source of your recent high idle?
 

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Well, the high idle reappeared new year's eve. I fired it up to leave work a little early and I immediately took off without any warm up. At all stops on my 18 mile journey home, the bike idled at 2000 rpm. It was 3 years ago when it happened before. Same high idle on my way to work this morning. I know, my bad for waiting 5 days to ride in the new year when the weather has been nice most of that time...geez. When coming home, the idle was back to normal. I use standard NGK plugs, which I replaced 9,000 ago. Still a mystery. @bruceb , did you ever find out the source of your recent high idle?
Oh man. I just came across your post. Reading it, I got excited, thinking someone knows something more than my the dealer. But, alas.

One month ago, I took it back for a second time. Still no result. Last week, mechanic said they planned to replace some kinda boots on the block. Since then....

I will update my post whenever, of if ever, I get it back. Fortunately, I haven't ridden much this year, because of you-know-what. Don't wanna find myself in an ER or hospital crowded with....

BTW, my CTX idles at 2500+2800. Sure makes quite a CLUNK shifting into first gear. Which is...what's the word for it...BAD!
 
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