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Old 10-07-2012, 01:06 PM   #5
divimon2000
Studly Adventurer
 
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Joined: Apr 2011
Location: Lake Champlain, Vermont
Oddometer: 589
I'm sure there are many potential issues here, but what come to mind are:
Fuel Filter/Regulator clogging/dying
Pump on its way out
Injector dirty (only way to really clean is sending out, ie. "cleaner" won't do it)
Exhaust sensor
Airbox sensor

You may come closer to figuring it out before sending it to $$ BMW service. Try these one at a time:
1. Cold starting with a bit of throttle (one of my bikes requires it below 60 degrees)
2. Starting it only after waiting a real long time after you turn the key to let the pump pressurize more
3. unhook airbox sensor- sometimes null is better than a bad reading.
4. unhook exhaust sensor

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