KTM 990 Adventure Problem With Ralenti

Discussion in 'Crazy-Awesome almost Dakar racers (950/990cc)' started by Decepticon, Aug 23, 2013.

  1. Decepticon

    Decepticon Been here awhile

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    Hi Everyone!

    I am new in this page and I wanted to start posting with a different topic, but my anxiety grew stronger than my patience.

    Last friday I left my KaTy M. in the garaje, aproximately 30 km before gas reserve signal. Wednesday I came back to ride it but the bike was very hard to start. If i gassed it, it ran, but she could not sustain the engine running at ralenti, at 1500 RPM.

    I could make it to my job with her, turning off at every traffic light. I drove enough to need a gas fill . When I stopped to refill (only one tank) I moved the wires and connectors of the gas pump. I restarted it and she sustained ralenti at 1000 RPM. I filled the tank and ran away.

    But the problem wasn´t that. The battery died because of the multiple start overs and traffic lights in the city. The electrician doesn´t know what the problem should be, and I think he is too lazy to discover. I want to do it myself.

    Things you should know: In my country the best gas is 92 octane, and regular is 87. I fill it indistinctively with both and the performance is the same. The Injection mapping is disconnected to deal with that thrashy gas here.

    Thanks for any hint.
    #1
  2. Deuce

    Deuce Crazy Canuck

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    Most likely you need new fuel filters. In the left tank. How many KM's on your bike? :1drink
    #2
  3. jfink

    jfink Can't get there from here

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    Fuel filters, exactly the problem. I had the same problem in Argentina and then again in Colombia in Cucuta. It gets expensive replacing these filters.
    #3
  4. Decepticon

    Decepticon Been here awhile

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    47000 km. But why Doesn´t the FI Sensor appears in the display? if the pump is clogged, the pressure is not the adequate and the fuel injection should not work properly
    #4
  5. Peanuts

    Peanuts Long timer

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    There is no fuel pressure meter in the fuel line............. so the Fi system does not know the pressure is low....... so there is no code for low pressure.
    #5
  6. Decepticon

    Decepticon Been here awhile

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    I did a cleaning/checking operation on the fuel pump. Nothing seems to be clogged or damaged. There was dirt in the base, but nothing out of normal.

    The engine now starts well, most of the times. But when riding, the bike looses the notion of ralenti and turns off. If I turn the switch or restart the system with the STOP ENGINE Button, the bike returns to normal, apparently.

    I think I have to send her to a scan in a KTM autorized service.
    #6
  7. Deuce

    Deuce Crazy Canuck

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    Fuel filters :ear :1drink
    #7
  8. johnyred

    johnyred Johnyred

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    #8
  9. Decepticon

    Decepticon Been here awhile

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    Today or maybe tomorrow the guy who charges a lot for his work shall tell me the real problem.

    Thanks guys for the help. I will inform you
    #9
  10. Decepticon

    Decepticon Been here awhile

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    Summing up:

    1. Checked Battery.
    2. Checked Battery Charger.
    3. Checked Fuel Pump twice, one by me, second by the Mechanic.

    Next steps done by mechanic
    4. TPS adjusted. Reassembling. Test drive. She doesn´t stall, but accelerates with no throttle. Very dangerous.
    5. TPS re-adjusted. Same step 4.

    He´s going to prove another TPS (finally!! what took him so long?)

    As I advised, he is going to check on the clutch sensor.

    THE QUESTION IS: If all of that thingies are good, What should I be loooking for and where? A priest, a Shaman? a dwarf inside the ECU?

    Is like this problem thread, but after re-adjusting of TPS is not anymore:
    http://www.advrider.com/forums/showpost.php?p=19564278&postcount=13
    #10
  11. bikyto

    bikyto Dans le doute...gaz!

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    It seems that your stepper motor is going crazy. A throttle body swap might just fix the problem. Or you could change the stepper...
    #11
  12. Katoom72

    Katoom72 Been here awhile

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    No need to play World of Warcraft to repair a 990. Did the dealer (or you) check the stepper motor? Is the bike accelerating fast like you pull the throttle or is the rpm rising slowly?

    edit: seems the person above me thinks about the same problem. :rofl
    #12
  13. Decepticon

    Decepticon Been here awhile

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    When you release the throttle the bike stays at 3000 RPM and then slowly lowers down to idle. just when riding. otherwise is good
    #13
  14. bikyto

    bikyto Dans le doute...gaz!

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    The stepper motor is on the throttle body and it sounds like it's the culprit to me at this point
    #14
  15. shawty950

    shawty950 Been here awhile

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    Using Tuneecu, ON my 07, when I stuff with the TPS, I have to do the "Adjust Throttle Cable" on the "Tests" tab, double click to reset the stepper motor otherwise it does as you have described. ie Idles OK, then when riding sits on 4000rpm...when you pul the clutch it takes about 10 - 20 seconds for the idle to come down again.

    If you do not have TuneECU then the KTM diagnostic tool should have the same procedure.
    #15
  16. Decepticon

    Decepticon Been here awhile

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    He´s using the second. I will ask him if he did that stepper motor reset. Thanks a lot
    #16
  17. Decepticon

    Decepticon Been here awhile

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    That says mech. It can´t be done
    #17
  18. bikyto

    bikyto Dans le doute...gaz!

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    They have to be able do it with the ktm tools because it's the correct procedure for throttle slack adjustments
    #18
  19. Decepticon

    Decepticon Been here awhile

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    Does Anyone know how to do stepper motor reset with KTM software?
    #19
  20. Decepticon

    Decepticon Been here awhile

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    I´d like to thank Bikyto, Shawty950, Katoom72, and the rest who post in this thread. You taught me a lot, and in some way helped tp get to the problem

    Steppermotor parameter down a bit (dunno if voltage or steps) and problem solved. I´d bet that tuneECU would solve the problem faster.


    Thanks a lot.
    #20