R1150GS won't push past 3500 rpm

Discussion in 'GS Boxers' started by CoalCreek, Mar 20, 2019.

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  1. Jim Moore

    Jim Moore Souped-Up Weasel

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    Mine had been rewired by someone, I think. it didn't look OEM.
    #41
  2. Welshman

    Welshman B.U.F.F.

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    Sounds like TPS to me
    #42
  3. ACD

    ACD old nOOb

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    Oops! My bad... Have to stop writing after 2a.m.
    #43
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  4. ilias1972

    ilias1972 Adventurer

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    hello
    Any solution to this problem?
    My bike r1150gs 2001 single spark run very very bad over the 3500 rpm. Noise from engine and not enough power and accelerate.
    HES has been replaced 5000 klm before.
    Fuel pump volume test OK! More than two litre per minute.
    Another issue i have is at idle when the bike is hot ... the bike run fine for 5-7seconds (for example) and then goes to turn off but it not turned off and then again fine etc etc etc etc
    any ideas?
    thanks and sorry for my english.
    #44
  5. rg sw wa.

    rg sw wa. Long timer Supporter

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    What were the last two things that you or someone else did to the bike just before the problem started ?
    #45
  6. mouthfulloflake

    mouthfulloflake Not afraid

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    throttle cable ferrule not seated

    bad TPS

    bad coil,plug wire or plug

    fuel pressure regulator?

    maybe?
    #46
  7. wardie

    wardie 2 Wheel Power Hour Supporter

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    Hey I’d check the catalytic converter if everything else proves good
    #47
  8. Andrew

    Andrew Optimus Primer Super Moderator Super Supporter

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    Let's not forget rags left in the airbox...
    #48
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  9. ultane

    ultane sqeezin the bag

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    Or birds and rodent nests.
    #49
  10. GS Addict

    GS Addict Pepperfool Supporter

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    Dog kibbles
    #50
  11. ilias1972

    ilias1972 Adventurer

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    The solution of the problem is a little bit complicated because the bike was off last winter for some works.
    Clutch complete set, seals at gearbox, rear main crank seals, brake tubes, chip at ecu from John Jemmi, cleaning injectors and some other things not mechanical or electrical.
    Two things my poor mind can associate with the problem...
    1. when i take back the injectors (cleaned as the specialist said) one of them was not work. I took it out of the bike, i wash it with aceton and it works.
    2. I was make a mistake with the rear main seal. Bad installation the outer. So for 40 klm the bike was have HIGH pressure in crankcase and oil leak. Is possible at this period would be damaged the temp sensor? Is it possible that a failed temperature sensor causes such problems? By the way... the RID temp display works fine.

    Problems (unstable idle and poor power over 3500 rpm) are sometimes more intense and sometimes less intense. The quality of gasoline maybe? I do not know. Maybe I'm making a mistake.

    The spark plugs and the air filter are about 4000 klm on the bike. The air box has been cleaned 1000 klm before.

    I sincerely thank you all for the help and interest!
    Sorry for my English.
    Thanks again!
    #51
  12. roger 04 rt

    roger 04 rt Long timer

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    It’s not the oil temp sensor and not (most likely) gasoline. I would begin by reinstalling the stock ECU chip.
    #52
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  13. ilias1972

    ilias1972 Adventurer

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    I will do this too with at first chance
    but.. i am very confused...
    today i put unleaded 100 octane in the tank. For 50 klm the bike runs fine. 50 klm in and out of city and five bars temp. Fine idle, fine acceleration.
    Τwo kilometers before the house (five bars temp) the problem was back again. Unstable idle. :(
    I dont know...

    by the way... i have tune the bike with your "zero" instructions
    THANKS
    #53
  14. Jim Moore

    Jim Moore Souped-Up Weasel

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    Have you changed the fuel filter?
    #54
  15. ilias1972

    ilias1972 Adventurer

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    yes. less 5000 klm before
    #55
  16. Jim Moore

    Jim Moore Souped-Up Weasel

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    I might do it again. Or at least take it out and see if you can blow through it.
    #56
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  17. GS Addict

    GS Addict Pepperfool Supporter

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    He is getting the 2l per min so the filter is good.
    #57
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  18. Jim Moore

    Jim Moore Souped-Up Weasel

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    Yeah, I saw that, but it sure sounds like a fuel problem and I'm kinda running out of ideas.
    #58
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  19. PukaWai

    PukaWai Long timer

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    This thread is now a month old, haven't heard from the OP in a while. Has it been fixed? If so, what was the issue? Inquiring minds want to know!
    Although my gut would tell me its a fuel delivery problem, I will always suspect the HES. I've had two of these go bad on me, and the procedure in the link on post #13 is good for what it covers, IMHO the HES has many failure modes only some of which can be detected by that procedure. The only way to be sure is to replace it. If you can find someone with a spare, try it out. I have one, but I now carry it with me on I bike I keep in Europe so its not readily accessible here.
    #59
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  20. mcatt1

    mcatt1 n00b

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    #60