I'm at my rope's end and hoping someone on here might know what the issue is...

Bike: 2016 Dyna Low Rider with short shots exhaust

Issue: When I was riding the other day my bike randomly started uncontrollably revving up to about 3000 rpm at idle with the clutch in. It came back down to normal idle on its own and the issue occurred a couple more times on the way back home. Once I got home I shut it off for about ten minutes and then tried to start it back up and it would just stall out after starting. I waited about an hour after the bike had cooled down and went to try and start it again and it started right up, idling normally. So I took it for a little test ride to see if the issue would repeat, and after about 5 minutes of riding the bike would stall out when I would come to a stop and would not idle. The issue has persisted for the past week.

There is no engine light and no DTCs. Spark plugs are new. I drained the fuel tank and refilled with new gas (in case bad gas was in the tank), replaced fuel filter, and fuel regulator. Fuel pressure is good, so fuel pump is good. I checked the idle stop screw and it hasn't moved.

Any ideas on what the issue could be? I'm completely perplexed...

 

Fuel pump intermittent or an intake leak be my guesses, good hunting.

 

Relax and take a deep breath. When you have problems, don't start randomly replacing parts. You are just wasting money. Diagnose the problem first and then repair it.

From what you describe, I am leaning towards a faulty throttle position sensor (TPS). It is a common sensor to go bad. Fortunately, it is an inexpensive part.

 

The TPS was the first thing that popped into my mind.

 

Faulty IAC maybe?

 

Yep. Check the connector on the TPS and make sure it isn't loose before going any further. The wire routing makes this a fairly common occurrence, and it happened to me.

 

Cleaning the IAC may be all you need, but the TPS would be a good suspect as well.

 

We all learn a little when those asking come back with the correct answer.