Strange idle

Reply Subscribe

Thread Tools

Search this Thread

Oct 25, 2017 | 02:53 PM

misterslim

Thread Starter

Advanced

Joined: Jun 2015

Posts: 67

Likes: 7

From: Northern NY

Strange idle

2015 FLS, stage 1

Stopped to talk to an old friend for a few minutes and when I started the bike to leave, it started weird. Not not the first try. The idle was high, about 1600 and stayed that way for several miles until I stopped, shut the bike down and restarted it. Started fine as normal and idle was normal. Several miles later, I came to a stop and the idle was high again. When I pulled into my driveway, it took several seconds for the idle to return to normal. Shut down and restarted and the idle was normal. The bike ran fine otherwise, temperature was in the 60's and riding was on back roads between 40 and 55 mph. Don't know if this could be related, but when I plugged my battery maintainer in, it stated a full charge which never occurred before. Unplugged it then plugged it in again and it acted as normal, indicating an initial 95% charge.

Any ideas as to what is causing this issue? Should I re-flash my Power Vision tune?

Thanks....

Oct 25, 2017 | 03:26 PM

Thingfish

Grand HDF Member

Joined: Jun 2010

Posts: 4,584

Likes: 918

From: coast to coast

The IAC (Idle Actuator Controller?) that sits right above your AC can sometimes stick. Might need a little cleaning.

Otherwise, voltage is a good guess too imo.

Oct 25, 2017 | 04:37 PM

jkinner

Road Captain

Joined: Jul 2010

Posts: 560

Likes: 88

From: Gila Bend AZ

I had a 09 sportster do that, I undid the battery for 5 min and reconnected it problem solved, worth a try and its free. Good luck.

Oct 26, 2017 | 04:34 PM

misterslim

Thread Starter

Advanced

Joined: Jun 2015

Posts: 67

Likes: 7

From: Northern NY

Rained all day today so will try and see if the battery disconnect thing worked tomorrow. I don't know how I could clean the IAC, so didn't try that.

Thanks for the ideas...

Oct 26, 2017 | 11:35 PM

Gommee

Devil's Advocate

Joined: Jun 2010

Posts: 2,070

Likes: 36

From: Alberta, Canada

IAC is common, cleaning works, but if cleaning does not, replacing is inevitable.

If you are looking for more info on cleaning the IAC and searching Softail forum does not help, Search the Dyna forum. There are threads there explaining it, Same intake.

Resetting ECU using the battery disconnect may help, but I highly doubt it is your Flash.

Oct 27, 2017 | 11:04 PM

misterslim

Thread Starter

Advanced

Joined: Jun 2015

Posts: 67

Likes: 7

From: Northern NY

Rode the bike under many varying speeds and many stops. Everything was fine - no erratic idle or any other anomaly noticed. I will clean the IAC over the winter layup. Bike has just over 7000 miles, can the iAC get screwed up in that minimal mileage? While poking around I found a capped 2 wire plug behind the air cleaner, what is that for?

Thanks for all the advice folks...