holzenbeindived
New member
Greetings!
This is my first post on these forums (which I'm afraid might be somewhat longwinded), although I have gleaned much useful information over the past several years searching the threads. A big thank you to you all for creating such a fantastic tool and sharing your knowledge and experience!
I have a 97 R1100R with 80K miles. This bike is my first foray into the world of Bavarian boxers, having ridden British twins for most of my riding life. I purchased the bike about 3 years ago and have put on maybe 15K mostly trouble free miles since. I live in northern NM and mostly ride between 5K and 7.5K ft, in mostly dry and dusty conditions. There is one gas station locally with ethanol free gas which I use almost exclusively.
Last year the bike started surging badly and I trawled these forums for ideas. I think I may have "solved" the surging (rewired Hall sensor, adjusted techlusion, etc) and when the bike starts she runs beautifully. Which brings me to my current problem, which I have not found a parallel for while trawling the forums: In short my bike will start, then stumble in idle for about 15 seconds then die (If i blip the throttle at all the bike cuts out immediately). I then start the bike again and it fires up and does the same thing. I can carry on doing this until the battery dies, or until it mysteriously fires up and idles at 1150rpm and runs fine. It will then start as it should until it cools down, at which point the dance starts all over again.
But recently I have found that if I start the bike then disconnect the TPS and let it stumble for two or three minutes until it eventually cuts out, then reconnect the TPS, the bike will start up just fine. This makes me think that the bike will run as it should once the O2 sensor warms up and therefore the problem is related to how the fuel air mix is delivered prior to the O2 sensor kicking in (am I way off base on this?). But I'm really unsure about how information is fed to the Motronic prior to the O2 sensor warming up. Any ideas, because I'm stumped?
FYI, things I've done so far to troubleshoot: new fuel filter and internal tubes (pump seems strong), cleaned tank, checked vents are clear (no charcoal canister), removed and cleaned throttle bodies, balanced TBs numerous times (throttle cables properly seated), adjusted valves a number of times (although they have always been in spec), new air filter, new plugs (plugs are looking black and wet, which they never did before), in addition to the previous work on HES and Techlusion.
Thank you in advance for any ideas about how I should proceed, and apologies for the length of this post!
This is my first post on these forums (which I'm afraid might be somewhat longwinded), although I have gleaned much useful information over the past several years searching the threads. A big thank you to you all for creating such a fantastic tool and sharing your knowledge and experience!
I have a 97 R1100R with 80K miles. This bike is my first foray into the world of Bavarian boxers, having ridden British twins for most of my riding life. I purchased the bike about 3 years ago and have put on maybe 15K mostly trouble free miles since. I live in northern NM and mostly ride between 5K and 7.5K ft, in mostly dry and dusty conditions. There is one gas station locally with ethanol free gas which I use almost exclusively.
Last year the bike started surging badly and I trawled these forums for ideas. I think I may have "solved" the surging (rewired Hall sensor, adjusted techlusion, etc) and when the bike starts she runs beautifully. Which brings me to my current problem, which I have not found a parallel for while trawling the forums: In short my bike will start, then stumble in idle for about 15 seconds then die (If i blip the throttle at all the bike cuts out immediately). I then start the bike again and it fires up and does the same thing. I can carry on doing this until the battery dies, or until it mysteriously fires up and idles at 1150rpm and runs fine. It will then start as it should until it cools down, at which point the dance starts all over again.
But recently I have found that if I start the bike then disconnect the TPS and let it stumble for two or three minutes until it eventually cuts out, then reconnect the TPS, the bike will start up just fine. This makes me think that the bike will run as it should once the O2 sensor warms up and therefore the problem is related to how the fuel air mix is delivered prior to the O2 sensor kicking in (am I way off base on this?). But I'm really unsure about how information is fed to the Motronic prior to the O2 sensor warming up. Any ideas, because I'm stumped?
FYI, things I've done so far to troubleshoot: new fuel filter and internal tubes (pump seems strong), cleaned tank, checked vents are clear (no charcoal canister), removed and cleaned throttle bodies, balanced TBs numerous times (throttle cables properly seated), adjusted valves a number of times (although they have always been in spec), new air filter, new plugs (plugs are looking black and wet, which they never did before), in addition to the previous work on HES and Techlusion.
Thank you in advance for any ideas about how I should proceed, and apologies for the length of this post!
the other day while getting ready to run a fuel pressure test, I started the bike and went through the usual routine. As usual she stumbled along in idle. Anyway, while figuring out how I was going to set up the pressure gauge, I absentmindedly wiggled and jiggled the hard plastic fuel lines where they enter the bike to the regulator. Lo-and-behold the bike fired up and began to idle perfectly. Upon further inspection I saw that the grommet holding the lines was severely degraded and the lines were just flopping about. Made a grommet from zip ties and ever since she seems to be running great (fuel pressure where it should be by the way).
