R1100RS--won't hold idle

[mgordon]

Bike recently died. Replaced: Hall Sensor, Motronic, Spark Plugs. Reset TPS. Checked ignition timing. Checked for fuel delivery; Checked for spark. Bike will only start with throttle wide open. Any suggestions? Battery is weak, though it will fire with a lot of coaxing, but runs like crap.

[John Brase]

This may sound simplistic, but have you checked that your throttle cables are tracking in their pullys correctly?

John

[rinty]

Throttle cables.

Rinty

[mgordon]

thanks, yes have checked. Will triple check again, but throttle is returning correctly everywhere i can see.

[breyfogle]

Bike recently died. Replaced: Hall Sensor, Motronic, Spark Plugs. Reset TPS.

You "reset the TPS" but that appears to be the only electrical part you did not replace....maybe a new TPS would be next

[mgordon]

I had the same thought, re: TPS. Though it's reading the correct values--.385v

[mgordon]

I'm thinking it could be an O2/Lamda sensor issue. Where the vacuum line connects to a sensor on the left side of the bike. There is one sensor plugged in, and another hanging unconnected. The connected one (O2) was not hooked up when i got the bike, and it runs to the muffler. What's the other one? I'm going to do a code readout.