No idle and high idle problem

[Ramseybella]

Re: No idle and high idle ??

Fascinating....does your riding regularly expose your bike to sandy conditions :question:

Seldom but not often, we have a lot of dust but most times when I go off road its on forestry roads and encounter a little dust.
I haven't checked this connections yet.

 

[Buckeroo Brad]

Re: No idle and high idle ??

I just had my 2012 S10 in the shop for these exact problems. Yamaha has a whole list of stuff that has been tried, but the sad fact is, they don't know what causes the problem. Until somebody gets seriously hurt or the problem becomes wide spread, they won't spend a lot of time on it. The entire time it was in the shop it never did malfunction. However, one problem was my throttle bodies were 25% out of sync with each other. Since this adjustment was made, the engine runs much better, doesn't stall, nor does the idle jump around. I still have a starting issue where it acts flooded. When I picked it up, it did just that to me. The shop manager was puzzled. he was standing there when it happened. They checked all the electrical connections, which are sealed plugs. All grounds were properly in place. All wiring was in the correct position. I also discussed with them the kill switch being incorporated in the start up procedure as mentioned elsewhere in this forum. It does not seem to be so. Previously the bike exhibited the most problems when the air was damp. But since the sync, I have no had a single issue, except for the occasional start issue where it mimics flooding. Shop mechanic claims they can't flood, but said they would spend some time reading up on that issue. When the bike mimics flooding, I pull back on the throttle, it starts, and runs normally. I'm just waiting for it to burst forward, which at that time, I will take the 30 mile ride to the shop. Also, they sprayed Power Foam through the intakes to clean the sensors. I have read elsewhere that the throttle sensors may be malfunctioning.

 

[mileageman]

Re: No idle and high idle ??

All you gentleman who have been following this thread, please see my post today. I put it under the Tech Section in Power and Exhaust. It might help I hope.

Best of Luck

 

[mileageman]

Re: Idle speed problem min 800 max 3500

For all the gentleman who have been following this topic, please see my post under Tech discussion - power and exhaust. I had the same discovery as Fintenere that he posted on 1-5-2013. As I read through all the posts I saw someone mention EMI as a problem. That is the conclusion I came to. If your still having problems, give my fix a try. It takes about an hour and is about $5 of wire sheathing. I have been trouble free for almost 3000 miles. Less time than it would be to take your bike to the dealer and get more head scratching.

 

[Midnightventure]

Looking for advice, engine revving on it's own

I posted this on Advrider on Friday and then added to it today. Hoping there is some solid advice available.
Midnightventure said: ↑
I went on a 400 mile ride today on my 2013 Tenere. About 220 miles in I stopped to eat. When I started the bike up it revved up like it was a fully open throttle. I immediately turned it off. I was 130 miles from home so I thought I would try it again. It started a little slow but started and revved normally. 160 miles later and about 20 miles from home I stop for a turn and realize it is idling at about 2400 rpm. I pulled in on the clutch a few times on the rest of the ride and realized it was idling pretty erratic. I was also starting to feel a sudden jump in RPMs while accelerating. I did a search and came up with cracked vacuum plugs when I got home but was just to tired to go check. It has 37000 miles on it. Also has after market cruise control that was turned off when these things happened. I'll check a few things tomorrow but thought I would see if anybody else has run into this and figured it out.

Yesterday I raised the tank up and checked the vacuum lines. They all look ok. The throttle cable has just about as much slack as I would expect. The cruise control has slack. I cleaned the air filter while I was in there and started to put it back together. Before I put the covers back on I started it. Immediately started revving. Shut it off and repeated 3 times. Same thing. Went into diagnostic mode. Throttle position close in D01 is supposed to show 9 to 20. I showed 21. Then I went to D14 to check the accelerator. Closed throttle it was 24. Normal is 12 to 22.
Open throttle was 103. Normal is 97 to 113. I turned the key off,back on and started it. It started and revved normally. I feel that the numbers that were out weren't far enough to really be the problem. If anybody knows any different I would like their advice.

 

[EricV]

Re: Looking for advice, engine revving on it's own

There have been some reports of dirty throttle position sensors causing issues. This might account for the slightly out numbers too. You can pull the plastic cover off and clean the contact plate with alcohol or a pencil eraser and it may help for a while.

You mention CC, if you are using a vacuum version, check the vac line connections. This could easily be just a vacuum line leak somewhere. I know you say you checked things, but it's worth another look. The throttle bodies on EFI bikes only manage air flow, the injectors manage the fuel, so a rpm change is much more often the result of an air leak causing things to be suddenly lean, and the rpms go up, rather than more fuel getting to the engine. Extra air is most commonly due to a missing cap on the right side throttle body, cracks in that cap or the left side hoses, or simply connections we have made for other reasons.

I tried some searches to find the post on the throttle position sensor, but couldn't find what I remembered reading. It's basically a plate with contact points on it and the metal finger that tracks across it. Not a big deal to clean up once you take the cover off. When they get dirty you get jumps in the readings as the throttle moves open and closed and it throws off the ECU, especially since we are throttle by wire. It just loses track of where it is.

Hope that helps.

 

[Midnightventure]

Re: Looking for advice, engine revving on it's own

Thanks, I will look for a vacuum line going to the CC.

 

[Checkswrecks]

Re: No idle and high idle ??

Merged threads and made into a sticky.

 

[Midnightventure]

Re: Looking for advice, engine revving on it's own

I posted this on Advrider on Friday and then added to it today. Hoping there is some solid advice available.
Midnightventure said: ↑
I went on a 400 mile ride today on my 2013 Tenere. About 220 miles in I stopped to eat. When I started the bike up it revved up like it was a fully open throttle. I immediately turned it off. I was 130 miles from home so I thought I would try it again. It started a little slow but started and revved normally. 160 miles later and about 20 miles from home I stop for a turn and realize it is idling at about 2400 rpm. I pulled in on the clutch a few times on the rest of the ride and realized it was idling pretty erratic. I was also starting to feel a sudden jump in RPMs while accelerating. I did a search and came up with cracked vacuum plugs when I got home but was just to tired to go check. It has 37000 miles on it. Also has after market cruise control that was turned off when these things happened. I'll check a few things tomorrow but thought I would see if anybody else has run into this and figured it out.

Yesterday I raised the tank up and checked the vacuum lines. They all look ok. The throttle cable has just about as much slack as I would expect. The cruise control has slack. I cleaned the air filter while I was in there and started to put it back together. Before I put the covers back on I started it. Immediately started revving. Shut it off and repeated 3 times. Same thing. Went into diagnostic mode. Throttle position close in D01 is supposed to show 9 to 20. I showed 21. Then I went to D14 to check the accelerator. Closed throttle it was 24. Normal is 12 to 22.
Open throttle was 103. Normal is 97 to 113. I turned the key off,back on and started it. It started and revved normally. I feel that the numbers that were out weren't far enough to really be the problem. If anybody knows any different I would like their advice.

I thought I would follow up with this. I monitored the diagnostics for about a week and one day the accelerator setting dropped down to 19 and a couple of days later it was at 17. I believe the accelerator sensor is probably the problem. I'm not one to replace something until I have confirmed it is the problem though. I adjusted it down to 14 and synced the throttle bodies . It has been doing fine. The day it happened was warm and humid and had been raining some. I fully expect it to happen again some day and I will immediately go into diagnostics and see what the accelerator reading is. Just the fact that it changed from 24 to 17 on it's own is pretty suspicious. When I started trying to figure this out I thought the throttle position sensor registered where the the throttle grip was being held but now I know that it is the accelerator sensor that does that and the throttle position sensor senses what angle the actual throttle plates are at.

 

[Ramseybella]

Re: Looking for advice, engine revving on it's own

Good to know.
Mine has been all over the place last three weeks more than I have experienced in the past, it's been behaving OK prior to that for awhile but always had the problem.
Starts up fine but after a few miles it dies sometimes then sometimes it ramps up to 2500 rpm on off key a few times then it go's away but now has been idling low at around 1k rpm and bounces around a tad under a tad over.
I also noted that on more than once I couldn't switch from T mode to S!!
It's 2k miles overdue for it's second tune up but don't have the cash at this time for it.. :-[
I changed the Air filter last month and battery but not the plugs.
How does one get into the diagnostics and how to read it and what?

 

[Checkswrecks]

Re: No idle and high idle ??

Ramsey -
By memory for your Gen1 bike, have the ignition off, press both dash buttons, turn on the key, and keep holding the buttons for something like 10 seconds. One of the buttons (right?) scrolls it up. I'll delete this post if somebody else has the book and can be more specific.

 

[Ramseybella]

Re: No idle and high idle ??

Thanks!!
I have the book on PDF I need to look this up.
I do believe it needs it's tune up ordered a set of plugs.

 

[Scott Sprague]

Random high / low RPM's - and engine dies

My Super Tenere is a Raven Black 2012, with 10,000 miles. The bike performed well until recently. In the last 500 miles, and two months - the bike exhibits random (dealer can not replicate yet) high idle of 3500 RPM's - and low idle of 800 RPM. During these episodes, the bike tends to die at stoplights. It is then hard to restart. The bike has also died during a left hand turn with on-coming traffic. Dangerous one there. On this Forum, there are many posts of the identical problem. There has been no recall by Yamaha. I am guessing that there are many origins for the same set of symptoms. Throttle body leaks, or imbalance, wiring harness breaks .... etc. This makes troubleshooting (no error codes showing for the bikes problems) expensive, if I am enlisting Yamaha to help identify and solve this problem. I called Yamaha Customer Service yesterday (representative was Randy) and he suggested working thru the local Yamaha Dealership and their use of Yamaha Technical Reps. OK. Here is a weird secondary point: my son has a 2013 Super Tenere and HE HAD THE SAME PROBLEM. His bike was under warranty, and after trying ECU replacement (nothing changed), Yamaha replaced the entire wiring harness. That fixed the problem on his bike.

Given the many Tenere Riders that have had the same problem, would you please describe what fixed it for you? What would be the logical sequence for troubleshooting this .... given that the bike is no longer under warranty? Thanks. This is my first post.

 

[Checkswrecks]

Re: Random high / low RPM's - and engine dies

My Super Tenere is a Raven Black 2012, with 10,000 miles. The bike performed well until recently. In the last 500 miles, and two months - the bike exhibits random (dealer can not replicate yet) high idle of 3500 RPM's - and low idle of 800 RPM. During these episodes, the bike tends to die at stoplights. It is then hard to restart. The bike has also died during a left hand turn with on-coming traffic. Dangerous one there. On this Forum, there are many posts of the identical problem. There has been no recall by Yamaha. I am guessing that there are many origins for the same set of symptoms. Throttle body leaks, or imbalance, wiring harness breaks .... etc. This makes troubleshooting (no error codes showing for the bikes problems) expensive, if I am enlisting Yamaha to help identify and solve this problem. I called Yamaha Customer Service yesterday (representative was Randy) and he suggested working thru the local Yamaha Dealership and their use of Yamaha Technical Reps. OK. Here is a weird secondary point: my son has a 2013 Super Tenere and HE HAD THE SAME PROBLEM. His bike was under warranty, and after trying ECU replacement (nothing changed), Yamaha replaced the entire wiring harness. That fixed the problem on his bike.

Given the many Tenere Riders that have had the same problem, would you please describe what fixed it for you? What would be the logical sequence for troubleshooting this .... given that the bike is no longer under warranty? Thanks. This is my first post.

Welcome aboard Rollin' Ready.

It'd be great to introduce yourself in the new members section. Folks frequently find other owners nearby with experience or to just meet up with.

As is usually mentioned the welcome email, the bike has been in production since 2010, so most problems have been seen, including what you described. Forum members are quick to help, but you'll find that the search function works well.

Your post has been moved to an existing thread discussing just what you asked for.

Glad to have you here.
::004::

 

[snakebitten]

Re: No idle and high idle ??

You're a good housekeeper wreckerchecker.

And helpful while you sweep.

Rollin Ready, I can't remember everything this thread was about, but the symptoms sound like a wiring harness issue, if I'm not mistaken.
However, even if I'm right, you'll need more info than that, so enjoy this thread sir.

 

[Ramseybella]

Re: No idle and high idle ??

Friday after blasting down I40 80mph to Albuquerque when I arrived at the stop light at Central it was starting to stall, then I turned off with the key restarted and then jumped into 3000 rpm idle..
I pulled over turned it off again waited all seemed normal but when I was riding along at normal city speed I let go of the throttle and it was cruising itself at 3000 rpm.
Pulled the clutch in and it dropped down to normal 1100 rpm. It did this until I pulled over again turned it off went into the store for an hour and now all is normal two days later.. ::010:: ::010::

 

[JoshMundy]

Bike Acting Up - RPM hanging and then bike dieing

The issue im having with the bike is yesterday I went to start it and would not start unless throttle was cracked open. After it started it idled fine for about a minute to warm it up. Went to ride to work and the rpm's would not drop back to 1k if i closed the throttle and pulled in clutch, they would hang anywhere from 3k-6k. Did this in all gears and didnt matter how high in rpms motor was ran. I pulled over after it did this for a bit and turned bike off, waited 5 sec and restarted. Bike ran fine rest of the way to work. No throttle was needed to restart, it idled perfectly and rpms never hung. Midday, rode it to a dr appt, and it ran fine, acting like normal. Going back home at end of day, it ran fine until i got close to my house. if i pulled in clutch bike would die. I could pop start the bike while rolling but anytime clutch pulled in it died. Pulled over, use button start and it needed throttle cracked to start. It continued to do same thing of pull in clutch bike would die. I get home, pull in clutch and bike dies, coast into driveway. Use button start and it starts right up, no throttle needed. Rode it around the block and ran fine, but when i got back home the throttle seemed a little off and hesitant when blipping throttle in driveway. Tried a few turn off and on at home and it continued to start right up but throttle still felt a little off, just not a crisp and precise. Leaving for work this morning in my car, I walk past bike and decide to see if it starts. Bike fires right up, idles great. Throttle feels much better than yesterday , but still a touch off possibly. I rode the bike 2 weeks ago and had no issues at all with how it ran.

So now about bike and my thoughts to the issue:
2013 ST with 7500 miles. ECU Unleashed Flashed ECU and Yosh RS4 Slip on.

I am wondering if it is a fuel issue, TB needs synced, or bad battery.

Fuel - Bike had 4.2 gallons of 91 octane non-ethanol put in 3/2/17, and has 3/4 tank still. I do not think the fuel should have gone bad in that short time but its a possibility.

TB - I do not think the throttle bodies have ever been synced, and the air screw (think thats the right terminology) is still probably turned all the way in, not 3/4 turn out. I might try to get to them this weekend.

Battery - I believe its the stock battery and when I rode bike 2 weeks ago it was hard to start (battery weak) but after riding it that day it charged up and started just fine, and has had enough battery power to start up well. I know a weak battery can cause some wierd electronic issues at times.

So those are my ideas, anyone have any other suggestions or can point me in a good direction?

 

[~TABASCO~]

Re: Bike Acting Up - RPM hanging and then bike dieing

I've seen this before... Syncing the TB fixed it (in my case)... one of the screws was WAY out... I would check the battery or stop somewhere that can check it for you to 'make sure'... Also, I would bump your CO up on your dash to +3 or +4 on both Cyl while your messing with the bike.....


You should be on your way then.... If not, let me know...

 

[Checkswrecks]

Welcome aboard Josh -
Your thread has been merged into the existing 7 page thread on this subject. Hope this helps you. Do report back when you figure out what your issue is.

 

[HeliMark]

As you mentioned, the battery could be a factor. Easy enough to pull it and take it to your local auto parts store and have them do a load test. At least eliminate that. I have a 2013 with the original battery, and I have not had a problem, but it is 4+ years old.

My experience with bad gas on the Tenere was crappy idle, hesitation, and just running like it didn't want to. Fresh gas, and some seafoam solved the issue.

Mark