I have a 2017 Dyna Low Rider, I purchaced new in 2017. A little over 2 years ago the bike started idling low, I'd hold the throttle open a bit to keep it from stalling and then i became concerned with overheating riding in city traffic. The bike is a daily rider. I brought it to a local shop they streightened it out with a new battery. I installed an ultra cool oil cooler to help with the overheating concerns. The bike ran good for about 4 months then more of the same idle issues. I cleaned the Idle air controler and things were good for a month. Then more problems. I replaced the idle air controler and the throttle position sensor and things were good for a couple months. but still bock to the same: irratic idle, sputtering when giving it gas starting off from a start and engine deying and not starting back up. I changed the intake air sensor and things were good but then the same. If i unplug the throttle position sensor it will start and run but kind of crappy. I clean my air filter regularly with oil change at 3,000 miles. I recently 45k miles changed the fuel filter it was filthy, black. The bike ran great like new for 3 weeks and then back to the same nonsense. I had also changed the engine temp sensor. Any ideas? I'm getting ready to replace the TPS plug.

 

Are you using an oiled type filter? if so you may be over doing it on the oil and if so I'd suggest a full cleaning of the throttle body and IAC.

Also I'd check for intake leaks.

Are you running any sort of aftermarket tuning on the bike?

 

Interesting. You've replaced at least 5 things, and each time the problem goes a way for a while, then comes back. I'd be looking for something you've done each of the 5 times other than replacing a part. Also, if you have any of the old parts, you could try reinstalling one of them and seeing if the problem again goes away for a time.

It seems highly unlikely that you had 5 different parts fail, all at similar intervals, and all causing the same symptoms.

 

Checking for intake leaks is a good idea. A DJ-PV or a logging device on the TPS position would help too.

Read somewhere, sometime ago that shutting down the bike with your hand on the throttle grip is a bad idea. Thinking back, that was attributed to a high idle because the TPS leans a -0 with your hand rolling forward and then the true 0 is elevated. I haven’t confirmed this myself, just spitballing.

Good luck