1 Powerloss on full throttle Mon Sep 11, 2023 5:18 am
TimJacques
active member
Hi guys,
First of all thank you for having me here. As opposed to working on K-series, I am new to the forum. I’m glad I get to join the discussion, but would first like to drop an issue here that I’m dealing with atm. I recently rebuild two identical K1100RS from 1995, and one is having trouble with the throttle. The electronics are identical on both bikes, and ignition loom is left untouched. Plugs, leads and injectors are brand new.
One is running flawlessly, the other runs and idles, but upon full throttle the engine cuts and sounds like it’s not even igniting anymore, it just dies down. If i let go of the throttle in time it will start running again, but if i hold it too long it stalls.
One interesting observation is when I unplug the TPS, the engine works without any issues. So I replaced the TPS, but as soon as i connect the TPS again the problem is back.
I’m a little in the dark here as I’ve replicated everything exactly the same on both bikes, and just one is giving me a hard time.
Additionally when it idles theres a vague beat to the engine as if it’s running on 3 cylinders instead of 4. Checked plugs (all are sparking), checked injectors (all are clicking), and the headers are all heating up, just header’s 1 & 4 remain approx. 10 degrees colder than the middle two.
Tomorrow I’ll be working on the bike so will try to eliminate more components from the suspect list, but if anyone has any ideas for what to try I’m all ears.
Thank you in advance!
First of all thank you for having me here. As opposed to working on K-series, I am new to the forum. I’m glad I get to join the discussion, but would first like to drop an issue here that I’m dealing with atm. I recently rebuild two identical K1100RS from 1995, and one is having trouble with the throttle. The electronics are identical on both bikes, and ignition loom is left untouched. Plugs, leads and injectors are brand new.
One is running flawlessly, the other runs and idles, but upon full throttle the engine cuts and sounds like it’s not even igniting anymore, it just dies down. If i let go of the throttle in time it will start running again, but if i hold it too long it stalls.
One interesting observation is when I unplug the TPS, the engine works without any issues. So I replaced the TPS, but as soon as i connect the TPS again the problem is back.
I’m a little in the dark here as I’ve replicated everything exactly the same on both bikes, and just one is giving me a hard time.
Additionally when it idles theres a vague beat to the engine as if it’s running on 3 cylinders instead of 4. Checked plugs (all are sparking), checked injectors (all are clicking), and the headers are all heating up, just header’s 1 & 4 remain approx. 10 degrees colder than the middle two.
Tomorrow I’ll be working on the bike so will try to eliminate more components from the suspect list, but if anyone has any ideas for what to try I’m all ears.
Thank you in advance!