Beiträge von Edi73r

  • K100 the fuel pump is not working

    Hello
    I have a serious problem with my BMW K100 RS , VIN 0018982K100RS. The fuel pump does not start when the ignition is switched on.


    The first thing I did was check the fuses.


    Turned out, that the second fuse is damaged counting from the bottom - 7,5A. I replaced the fuse


    The pump is OK - after applying the external power supply it works.


    The relay through which the pump is powered is not activated. After
    switching on the ignition, the relay does not "click". The relay itself
    seems to be functional, a characteristic "click" is heard when the
    external power supply is given.


    I replaced the ignition module, the one installed under the fuel tank, in the front part. Nothing has changed that.


    Starter, spark on the the spark plug, indicators on the meter - work normally


    After many tests it turned out that there is no minus from ignition control unit on the fuel injection relay.
    At terminal number 86 fuel injection relay after switching on the ignition 12V (up to ground) appears, but there is no minus at terminal number 85. After switching the ignition on terminals 85 - 86 the voltage is about 0.1V, it is not enough for the contactor to close the contacts.


    The cable from the terminals 7 ignition control unit to the terminals 85 fuel injection relay is not interrupted.


    If I cut the cable and connect terminals 85 fuel injection relay permanently to ground, everything works normally. After switching on the ignition - the fuel pump starts working, I turn off the ignition - the pump stops working.The engine starts without a problem.


    Can I leave it like that?
    Is this something threatening?
    What is the reason - Why the ground to the terminals 85 fuel injection relay comes from the ignition control unit?


    One more question.
    When should the fuel pump switch on?
    a) after switching on the ignition
    b) after switching on the ignition and pressing the starter button?


    Thank you very much for the hints.


    regards
    Edi

  • K100 the fuel pump is not working

    Hello
    I have a serious problem with my BMW K100 RS '85. The fuel pump does not start when the ignition is switched on.



    The first thing I did was check the fuses.


    Turned out, that the second fuse is damaged counting from the bottom - 7,5A. I replaced the fuse



    The pump is OK - after applying the external power supply it works.


    The relay through which the pump is powered is not activated. After switching on the ignition, the relay does not "click". The relay itself seems to be functional, a characteristic "click" is heard when the external power supply is given.



    I replaced the ignition module, the one installed under the fuel tank, in the front part. Nothing has changed that.



    I also made a test with a wire that reaches the fuel pressure sensor, which is attached at throttles.
    I removed it from the sensor, I left it in the air - no change (the fuel pump relay does not click), I connected the cable to the ground - no change (the fuel pump relay does not click).



    Starter, indicators on the meter - work normally


    What to do? Do you have any ideas?
    Please help.


    Regards
    Edi

  • BMW K100 RS, length of the throttle cable

    Zitat von madeunddielt

    if you got a VIN No.

    Yes I have - 0018982K100RS



    Zitat von madeunddielt


    BTW : a short introduce would be nice - it´s state of the art in the german forum culture :D

    Sorry.
    My name is Edmund. On my clock I can see 46 years. I have a wife and two kids. I am from Hrubieszow / Poland. It is small city near Ukrainian border. I have my BMW K100RS from 10 years. During this time, I traveled 40,000 km on my motorcycle. Farthest to the west I was in Normandy (alone), the farthest south - Pitesti / Romania (with my son), the farthest north - Nordkapp / Norway (with a friend). The longest trip in one day - 1500km / 15.5h from Holland to home (alone). The longest-lasting trip - Normandy 11 days. I have been in Germany, the Netherlands, Belgium, Denmark, France, Switzerland, the Czech Republic, Slovakia, Hungary, Romania, Ukraine, Lithuania, Latvia, Estonia, Norway and Sweden. On my BMW K100RS, of course. Plans - I would like to see Trollstigen in Norway next year.