OK, I thought I had this issue licked, but apparently do not. I detailed all the symptoms below. I am beginning to wonder if it is something with the fuel pump, filter or lines. Might explain why it happens when throttle is at 0 & clutch engaged. Cycling the kill or ignition would reprime the pump. Mmmm. Thoughts?

 

i am having a similar problem w/ 09 road glide .. dealer could not find any codes.. added update to ecu but did not fix .. took it to dyno to chk. idle program also.. only other possibility maybe bad computer....

 

Sorry to hear of your troubles. What bike do you have and can you list whatever you've already tried as fixes? My first thought would be a problem with the kill switch or it's wiring. I say this because of the engine not even cranking until you've cycled that switch. Then again, more information will help.

 

It's a 2008 Ultra Classic. I added Crusher slip ons and a SE air cleaner. Had a Fuelpak on and thought that was the problem. Took it off and it still happened. Only thing that makes me think it is NOT the kill switch is that it only happens at closed throttle. I would think a kill switch short could happen at any moment. It never happens at steady cruise.

 

Does your bike have a security module?
Maybe related to that...

 

It does, but I can't imagine it is that for the same reason I don't think it is the kill switch. It doesn't happen at just anytime; it happens only when the throttle is closed (if even for the time it takes to shift) and the clutch engaged. I would think a random electrical issue would have no regard for throttle position (other than if it were an issue with the TBW).

 

have you checked TBW plug at the bars and fairing surely sounds electrical if you need to recycle kill switch. I would also try disconnecting alarm and see if it still does it

 

I would troubleshoot the alarm and start/stop switch, both could be faulty. My 2 cents.

 

tip over switch

 

This is just a thought, but if the ECU thought something was wrong when the engine shuts down, it would throw a code. I'm assuming no codes are thrown. That being the case, I would check the IAC for sticking or adjusted to high. If the IAC stepper is set to high or sticks, it doesn't kick in during decel or shifting (when throttle goes back to "0") and it feels like the motor is off when your slowing down and then pops in before you come to complete stop. Sometimes, it doesn't kick back in and the engine stalls out. When the IAC is operatingly correctly, it is a smooth transfer between throttle decel and idle stop. I run 40 steps at hot idle. 38-42 should be ok.