BMW K bikes (Bricks)


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1Back to top Go down   Wont throttle up? Empty Wont throttle up? Sun Aug 05, 2018 5:35 pm

Foxxys

Foxxys
active member
active member
Hi guys, recently posted a thread about bike running but would cut out which turned out to be a breather problem. Has been running sweet since the breather problem was fixed. Went out tonight and broke down, engine stopped and every time I open the throttle it cuts out. Starts and isles but as soon as you go to open up the throttle it hesitates and won't throttle up. Breather is fine and isles fine... I'm gutted after it running so well. Oh and yes I can hear the fuel pump running.

    

2Back to top Go down   Wont throttle up? Empty Re: Wont throttle up? Sun Aug 05, 2018 8:44 pm

Rick G

Rick G
admin
admin
I would suspect a fuel pump so check the fuel pressure. Remove the fuel filler assembly, 4 screws. Then remove the internal line that goes from pump to filter from the filter. Grasp the line in your hand with your thumb over the end of the line while the line is inside the tank and with the ignition on press the starter button you should be barely able to prevent fuel escaping if the pump is up to scratch. then with the line facing into the tank press the starter and without your thumb on the tube the fuel should come out like a fire hose, but I sure wouldn't recommend using it for a fire hose Very Happy .
If that seems OK put a new filter in and try running it again.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1999 K1100 LT with a Big Block 1200
    

3Back to top Go down   Wont throttle up? Empty Re: Wont throttle up? Mon Aug 06, 2018 6:12 am

Foxxys

Foxxys
active member
active member
Cheers, now that I think about it I did have the seat up on Saturday night and unplugged the loom that comes from the box with the plunger. Could a dirt connection to this be the culprit. I did notice an alarm going off when I unplugged the cable from the box and the alarm only went off after I turned the ignition on? Anyway 're connected cable to plunger box and seemed fine but can't help thinking this might be the culprit? What is that box under the seat with the plunger?

    

4Back to top Go down   Wont throttle up? Empty Re: Wont throttle up? Mon Aug 06, 2018 2:46 pm

Laitch

Laitch
Life time member
Life time member
Foxxys wrote:. . . Anyway 're connected cable to plunger box and seemed fine but can't help thinking this might be the culprit? What is that box under the seat with the plunger?
If it looks like the attached photo—with or without the labels—it is part the anti-theft alarm system. If its connectors to the main harness or wires are dirty, corroded, or otherwise compromised, problems can arise.
Wont throttle up? S-l16010


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1995 K75 90,000 miles
    

5Back to top Go down   Wont throttle up? Empty Re: Wont throttle up? Mon Aug 06, 2018 3:28 pm

Foxxys

Foxxys
active member
active member
Yea that's the one. I had the cable out of it on Saturday night.

    

6Back to top Go down   Wont throttle up? Empty Re: Wont throttle up? Wed Aug 08, 2018 6:36 am

Foxxys

Foxxys
active member
active member
Does the fuel pump run all the time when the engine is running? Or does it go off and on with the relay according to what the computer says??

    

7Back to top Go down   Wont throttle up? Empty Re: Wont throttle up? Wed Aug 08, 2018 6:39 am

Dai

Dai
Life time member
Life time member
It runs permanently when the engine is running. The injectors regulate the amount of fuel that the cylinders get.


__________________________________________________
1983 K100 naked upgraded to K100LT spec after spending time as an RS and an RT
1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

8Back to top Go down   Wont throttle up? Empty Re: Wont throttle up? Sat Aug 18, 2018 7:07 pm

Foxxys

Foxxys
active member
active member
Finally fixed the problem... faulty spark plugs and a flooded engine... replaced plugs and started up on full throttle with no choke... Perfect now. Tnx to all for help..

    

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