Symptom - Ran a few errands and when I got home my bike was idling around 1500 RPM's
I didn't think much about it. Later that day I went to a friends house on the way there I stopped for gas, when I was coming to the light the idle was around 2k now. I was like WTF?
By the time I got to my friends house the bike was idling at 5500, and my check engine light was on. I checked the error code and I was getting a P0505 code.

Solution - I search this forum and found a similar issue and fix. On the bottom front of the intake there is a screw that is used to adjust the throttle. That screw had worked it's way out and was holding my throttle open. I put some blue lock-tite on her and tighten it back up. Problem resolved.

Thanks everyone who has posted on this

 

i had the same thing happen to my 2007 Street Bob today !!

 

Thats a good fix.
I had that and one of the injectors was leaking thru.

 

Got on my 07 flhx today and when I came to a stop it was idling at 3000 rpm......uuuuugggghhhhh

I work on cars and have just started doing basic maintence on my Harley....but I have know Idea where this "screw" yall are referring to is located to you have a pic of where it is at? My bike is Fuel Injected...fyi