2014 Sportster Iron. Happens only when it is hot.

Here are the links to the dropbox videos:

https://www.dropbox.com/s/by08muu9tg...e_000.mov?dl=0

https://www.dropbox.com/s/dsth2r8ka7zlj5k/1.mov?dl=0

 

Different pipes?
Air filter?
Scott

 

Vance and Hines exhaust and intake. Dunotuned 2 times by HD dealer.

Alex

 

Intake leak somewhere.

 

How to diagnose and where to look for the leak?

 

You sure or you just guessing? I had an intake leak an the head and my idle went high to around 1800. Caught it by pointing propane gas in that area and it coughed and stumbled.

 

Just a guess here but I have seen and witnessed surging due to very lean tune conditions

 

Yes. It's lean if you have surging while cruising at partial throttle position/opening. Say around 1/8 to 1/4 turn at the grip. Possible the throttle position sensor is off but I would stick with some form of fuel enrichment first.

 

Thank you everyone for your help. Here is an update:

Today was really hot. The surging got worse. The engine died a few times when I let off the throttle. There was some surging during acceleration too now. The check engine light came on and went off a couple of times. I barely got back home.

 

How do I check for an intake leak?