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Old 10-07-2012, 06:10 PM   #1
NW Cascade Rider OP
Dual Sport
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Joined: Oct 2012
Location: North Cascades
Oddometer: 19
Pissed Throttle hesitation R1100GS

So I have been working this issue for a while now. I changed the fuel pump, filter, and what I'm going to call the fuel rail/distributor with the fuel pressure regulator. I am quickly running out of ideas. I performed the "zero zero" today as well as removing the "rose" from the fuse box and jumping pins 30 and 87 as well as pulling fuse 5 to reset the motronic. The throttle bodies were synced not to long ago as well.

The symptom it self is: Under heavy / hard acceleration, or past about 65 MPH the throttle goes flat. No power at all, and if anything I'm loosing speed. However at a low power demand, I.E, riding below 65 at a calm pace, and idling, the bike is just fine. It is a little rough starting when cold, but once warmed up, idles just fine with maybe just a cough every now and then.

The only mods I have on the bike are a GPR exhaust system with a cat delete and a K&N air filter. Any input or help to resolve the issue would be a huge help. I am very mechanically competent. I could just replace all the parts that I would suspect are causing the problem. But I would prefer some wisdom and input with people who have experience with these bikes.
95, R1,100 GS
99, E46 323I, 2.5
05, E53 X5, 3.0
82, E24 635CSI, 3.5
Eat, Sleep, BMW.
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