Bike has 59k miles and runs great except it would stall at idle. I worked on this on and off all summer and did many tests, including:
- Verified that the idle step motor was moving ok and it's lines were clear..
- plugs ok. Replaced anyway.
- air filter clean.
- valves adjusted.
- no air leaks by propane test.
- throttle position set using GuzziDiag
- fuel pressure ok
- injectors spray fine, looked clean. Clean again anyway.
- nice string spark, at least on the outer plugs.
- replaced all 4 plugs.
- cleaned both connectors to computer with electronic spray cleaner.
- watched the injector timing with an oscilloscope (~2.5 to 3.2 mS pulse width at or near idle).
- more stuff I can't remember.
What fixed it? I used GuzziDiag to "reset learning parameters". Works fine now!
