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Old 04-17-2015, 02:48 PM   #1
Loutre OP
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My turn to seek for help: R1150GSA Sputtering, refusing to accelerate after 3600rpm

5Well hi there crowd. After reading alot of different threads and still not finding any solutions I'm starting a new thread to see if some one can help me out here.

Bike:
R1150GSA 2006 with ~108000kms on clock.

Last changes before problem appeared:
changed pivot bearings (nothing to do with the problem but before the question is asked)

Backstory:
Went to visit a friend of mine for the week end 160kms away. Bike ran the last past days better than ever, (though it was BACKFIRING a lot more than usually, with EACH decelleration) was really smooth and I was impressed once more how much I liked it. Then about 40kms before arrival I hit reserve on my bike. Thought it would be plenty before arriving and decided to head on. 15kms before arrival the symptoms began to appear. Bike began to stutter, sputter, what ever you call it. Refused to accelerate above 4000rpms. Could turn the throttle but only the engine would vibrate a lot more but no ponys would appear under the rear tire. Thought it was because it was low on fuel. Put in the best octane that I could find (98). Problem didn't go away. Managed to ride home two days later but wasn't able to go above 4k rmps.

Sum up of symptoms:
-
stuttering from 3k rpm all the way up (no acceleration possible)
- backfired a lot before this happened

What has been done recently:
- adjusted valves since I thought it was that (they were a bit tight after 15000kms without adjustment)
- throttle cables have been replaced (5000kms ago)
- HES has been replaced (5000kms ago)
- tbs has been adjusted (10000kms ago)
- cleaned air filter

Going to undo the tank tomorrow and see if the filter is clogged. Me thinks either that, stick coils or TBS is off?

Loutre screwed with this post 04-17-2015 at 02:53 PM
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Old 04-17-2015, 03:01 PM   #2
Beecher Snipes
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First thing that comes to mind is spark plug coil failure, or loose wire on coil.
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Old 04-17-2015, 03:04 PM   #3
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I would start by making sure all your fuses and relays are seated properly. The I would change the fuel filter.
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Old 04-17-2015, 03:08 PM   #4
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Quote:
Originally Posted by Jim Moore View Post
I would start by making sure all your fuses and relays are seated properly. The I would change the fuel filter.
Since it happened when you ran low on gas it could be a clogged filter. Easy enough to check. But if it's not that I'd check out the stick coil.

Check out this thread if you want a cheaper solution

http://advrider.com/forums/showthread.php?t=713106
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Old 04-17-2015, 03:22 PM   #5
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First thoughts are fuel filter and/or stick coils. My 1150 has 140,000klms and on it's second replacement pair of stick coils. Interested to see how this pans out.
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Old 04-17-2015, 03:43 PM   #6
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My money is split among these three in the order of what I think is most likely, each has happened to me.

1. Clogged fuel filter, I don't have a simple test for this because you will have spray from the injectors, but you need to be able to tell if you have enough. I will say this, if you can slowly increase throttle and build speed, but if you open the throttle briskly and the engine boggs the filter is very likely the cause.

2. Stick coil, pull off the plug wire on one side, run the bike, put it back and do the same on the other side. If one side made no difference, that is the bad coil

3. Evap canister clogged, open the cas cap, do you hear air rushing in as you open it, and does it run fine for a few minutes? If yes, clogged canister.
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Old 04-17-2015, 03:55 PM   #7
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wow so many replys in such a short notice thanks guys.

during my absence I went ahead and checked the coils. pulled left one first. Have a spark but bike refuses to start. Then pulled right one. have spark and bike starts.

So what does that tell us? Secondary left one dead?
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Old 04-17-2015, 03:58 PM   #8
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Main plug stick coils....

To check pull off the secondary plug caps located underneth on each side and see if it runs on just the main plugs.
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Old 04-17-2015, 03:59 PM   #9
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brb!
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Old 04-17-2015, 04:00 PM   #10
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Quote:
Originally Posted by Loutre View Post
wow so many replys in such a short notice thanks guys.

during my absence I went ahead and checked the coils. pulled left one first. Have a spark but bike refuses to start. Then pulled right one. have spark and bike starts.

So what does that tell us? Secondary left one dead?
Swop the coils over from one side to the other and see if the problem follows with the coil..
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Old 04-17-2015, 04:02 PM   #11
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Also, the secondary plug tends to oil up on the cylinder with the main coil out if it's been slowly failing over a period of time...
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Old 04-17-2015, 04:20 PM   #12
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Quote:
Originally Posted by Steptoe View Post
Also, the secondary plug tends to oil up on the cylinder with the main coil out if it's been slowly failing over a period of time...
Reporting back.

Managed to cut myself on the touratech protection for the secondary coil.
Managed to shock myself on both secondary coils whilst trying to start the bike. Darn that woke me up. Even working on these bikes can be an adventure

Enough blabla.

Like with the main coils: right side out bike starts. Left side out, bike refuses to start.

Left secondary coil is oily indeed! so which one is failing left secondary or left main coil? eventhough both giving a spark?
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Old 04-17-2015, 04:25 PM   #13
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swapped as suggested right main coil to the left side. left the right side without a coil, bike starts and pourrs like a kitten. Guess I know that I have a faulty coil now!
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Old 04-17-2015, 04:34 PM   #14
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part number for dual spark is this one right? 12 13 1 341 978

Let me all thank you for your quick help! will order a fuel filter at the same time (just to be sure for the near futur!) -> yeah scratch that, just took a look and previous owner replaced fuel filter at 78000kms just before I bought it. guess that information could have narrowed down the problem pretty easily.

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Old 04-17-2015, 06:10 PM   #15
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Hope I haven't lost track of this conversation because of some difference between Brit talk (Steptoe) and American talk. Did we just figure out that it was a bad stick coil? If yes, isn't that part no. 12121342641?

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