Page 2 of 2 FirstFirst 1 2
Results 16 to 22 of 22

Thread: 2012 RT Intermittent Stuttering/surging Running Problems

  1. #16
    Registered User bicyclenut's Avatar
    Join Date
    Jul 2016
    Location
    Sugar Grove, IL
    Posts
    84
    On my 2010 RT I had a intermittent misfire/stumble. I would be riding down the expressway on cruise, at a steady speed or accelerating and there would just be a brief stumble or feeling of a brief misfire. It was VERY intermittent and I saw no errors when I checked for codes with my GS-911. I tried injector cleaner and had synced the throttle body. Had about 60K. I replaced all the coils and spark plugs at the same time and it resolved the problem. I had done research on this and this seemed to be one of the causes of this and I finally decided to try it and that was the fix for me.

    This is a source of BMW stick coils that would be an alternative to a BMW dealer:

    https://www.euromotoelectrics.com/category-s/1754.htm
    2010 BMW R1200RT
    2014 BMW C650GT (sold)
    MOA # 208387

  2. #17
    Quote Originally Posted by drneo66 View Post
    Unlikely you picked up that much more water, but it depends on where you were traveling.

    I assume you have enough slack in the throttle cable? All the vacuum hoses are connected correctly?

    Did you reset the throttle positioning sensors when you reconnected the battery? (Turn ignition to on but don't start bike. Slowly open the throttle wide open then closed, open/closed a total of three times)

    Bad coils could be an issue, but I'd assume it would be unlikely that several would go bad. I think the secondary coil is used during lower RPMS and then the primary takes over at higher?? You could swap/reseat them just in case.

    Have a friend with a MotoScan or GS911?
    Thanks

    No friend with a GS911. I thought about buying one. I did do the TPS reset. Bike did idle fine after that. Rode it the next day and is stuttered while running high RPM's.
    So I just took it home before it got worse.

    Discussed with the Dealer and they said this is not a normal issue and will have to start testing all the different systems. This is above my knowledge level on this.

  3. #18
    Quote Originally Posted by lkraus View Post
    All four coils are in use at low rpm. As rpms rise, the timing on the lower coils shifts nearly 180, and they don't contribute much to combustion. A loose coil wire on a primary coil produced intermittent hesitation and stumbling above ~3500 rpm on my RT, especially under acceleration. It ran normally at lower rpm or under light load. One way to check would be to disconnect a suspect coil, if the the bike runs worse that coil was good, if there is no change you found the problem.

    I have not suggested coil trouble because apparently the problem has occurred while starting from a stop and required high rpm to get moving, which is quite different than the trouble I experienced.
    Thanks
    The first it happened was at high RPMs and when I parked it it was also doing it at high RPM's. I may check the coils before it go into the dealer, but I think I will take it there because I do not want to have this happen while I am out away from the house.

  4. #19
    Quote Originally Posted by bicyclenut View Post
    On my 2010 RT I had a intermittent misfire/stumble. I would be riding down the expressway on cruise, at a steady speed or accelerating and there would just be a brief stumble or feeling of a brief misfire. It was VERY intermittent and I saw no errors when I checked for codes with my GS-911. I tried injector cleaner and had synced the throttle body. Had about 60K. I replaced all the coils and spark plugs at the same time and it resolved the problem. I had done research on this and this seemed to be one of the causes of this and I finally decided to try it and that was the fix for me.

    This is a source of BMW stick coils that would be an alternative to a BMW dealer:

    https://www.euromotoelectrics.com/category-s/1754.htm
    Did you get the coils from the dealer or from the source you sent? If you got them from the source, were there any issues? The savings is a couple hundred dollars.

    I did test two coils last night and one is weak. I am thinking that I should just replace all 4 to be safe.

    Thanks

  5. #20

    The issues continue but are now different.

    Well, I parked the bike at the end of April and had an appointment in early June at the dealer. Dealer let me know that the recall pump was not in but to go on and drop the bike off due to the fact they had aver a 3 month backlog of work. Dropped the bike off in June, and at the end of July the fuel pump came in. The pump was changed and I got the bike after the 1st week in August. dealer put about 70 miles on the bike and said it was good to go. First ride when I got home the bike stumbled. I rode the bike some, no issues. I have put only about 400 miles on the bike since then with no issues. I have been riding my new Moto Guzzi V850tt. Yesterday I took the BMW out and had a new problem. The bike felt like it was running out of gas. The tank was low so I filled up and headed home. Anytime I decelerated, it was like the bike was out of gas. It wanted to die. A couple of times I pulled in the clutch and the engine cut off. I headed home running rpms 5-7k. When I rolled off the throttle, the engine was like it was out of gas. Got home and the engine died at the bottom of the driveway. Bike would not start. After two tries I left the bike and went to the garage to look for my jump box since it seamed like the battery was low. Could not find it, went back to the bike, bike would not turn over first try, second try it turned over and started. Pulled into the garage. about an hour later put the battery on the battery tender and within 30 minutes it was showing a full charge.

    I have put new plugs, 4 new coils, new fuel pump and there is some issue. I don't think the dealer did much other than the fuel pump. Same dealer says they can look at the bike the week before Christmas. I don't think I will take it back to them unless it is to see what they will buy the bike from me for. At this point I have no faith in my BMW that has 52000 miles. I know these bikes can easily run 100 K miles. I am super frustrated in what I consider to be the best road bike that I have ever owned.

  6. #21
    Registered User bicyclenut's Avatar
    Join Date
    Jul 2016
    Location
    Sugar Grove, IL
    Posts
    84
    Quote Originally Posted by var1200rt View Post
    Did you get the coils from the dealer or from the source you sent? If you got them from the source, were there any issues? The savings is a couple hundred dollars.

    I did test two coils last night and one is weak. I am thinking that I should just replace all 4 to be safe.

    Thanks
    Sorry just saw this. I ended up finding a set of used coils on eBay from a 2011 that had 6000 miles on it but was parted out due being totaled by insurance as I recall from front end damage so I figured coils were like new compared to mind with 50k + miles. I would have purchased from aftermarket source in CO if I had not found these.


    Sent from my iPad using Tapatalk
    2010 BMW R1200RT
    2014 BMW C650GT (sold)
    MOA # 208387

  7. #22

    Easy Peasy, just need the right part

    On my 2011 RT, I had the same symptoms you describe. When I bought mine with 11k miles it had only run about 1k in 6 years, so naturally I went about cleaning the fuel system because these symptoms easily can be caused by bad gas, clogged injector, or gunk in the tank, filter etc. To no avail. Discussing this with a group and one fellow said, same bike, same problem, ready to sell/give it away. We got our heads together, did the research, finally decided to swap the Throttle Position Sensor (TPS) and borrowed one from another bike. Friend went first, put a tank of gas through it with no problem. I did the same, however I knew after 2 miles that mine was fixed, because it barely ran before. Take off the left side plastic and its's a 5 minute fix. Neither have had any recurring problem for over 20k miles each. TPS, also known as "Throttle Valve Switch", about $200 from Max, or A&S, or Bob's. 13 54 8 406 249 THROTTLE VALVE SWITCH

Similar Threads

  1. 2008 R1200RT - Intermittent Rough Running
    By ExGMan in forum Hexheads/Camheads
    Replies: 10
    Last Post: 08-13-2014, 05:10 PM
  2. intermittent rough running; hot cat
    By MinnesotaRik in forum Oilheads
    Replies: 4
    Last Post: 07-21-2014, 11:26 PM
  3. Intermittent Very Rough Running
    By richardak in forum Airheads
    Replies: 19
    Last Post: 11-25-2013, 11:25 PM
  4. 2012 GSA intermittent stalling
    By OfficerImpersonator in forum Hexheads/Camheads
    Replies: 4
    Last Post: 05-31-2013, 10:34 PM
  5. Intermittent Starting Problems 1150RT
    By moenko in forum Oilheads
    Replies: 10
    Last Post: 06-04-2012, 11:53 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •