07 street bob stalling
Road Warrior
Joined: Sep 2012
Posts: 1,252
Likes: 7
From: SLC, UT
I love threads like this!! Right to the point. I am experiencing the same thing as of yesterday. I went on a dusty ride over the weekend, and I made it a plan to clean the filter (which I did) and noticed the problem on the very next ride. I'll have to give this a shot as well, and post my success.... I didn't even think to check the IAC.
Cruiser
Joined: Jul 2012
Posts: 195
Likes: 0
From: Florida
Hate bringing an old thread back to life, but hopefully this will help more people like it did for me yesterday.
Was stalling out on the last couple of rides when I would come to a stop (4 times on yesterdays ride, which got me searching this site), tried a number of other things, but after cleaning the IAC I was back in business. Saved me from having to bring my 2012 FXDB in to the shop! Thanks guys!
Was stalling out on the last couple of rides when I would come to a stop (4 times on yesterdays ride, which got me searching this site), tried a number of other things, but after cleaning the IAC I was back in business. Saved me from having to bring my 2012 FXDB in to the shop! Thanks guys!
IAC Done?
Had idling issues start last riding season and thanks to this forum tried the carb cleaner routine and sure nuff got her running almost like new. Well it has come back with a vengeance and after a VERY thorough cleaning with carb cleaning while cycling the ignition as well, she idles OK for 10-20 seconds and then starts coughing/backfire big time till it stalls. So I think the next step is to replace the IAC but just wanted to do a sanity check with some of the old salts out there. Attached video of her getting sick, is this what a bad IAC will do? Runs fine at RPM but down at idle she acts like the video. Thanks for any and all input.
Stellar HDF Member
Joined: Feb 2013
Posts: 3,072
Likes: 1,727
From: Dallas, Texas
Never had any of these problems with my 07 SB. Every 3 months I put 1.5 oz of Gumout Carb & FI Cleaner in a full tank of gas. Just got tired of the lack of low end torque. So I converted it to a CV 40 & stand alone ignition. Now it rolls!!!!!
Tourer
Joined: Jul 2007
Posts: 290
Likes: 21
From: Portland Oregon
Had idling issues start last riding season and thanks to this forum tried the carb cleaner routine and sure nuff got her running almost like new. Well it has come back with a vengeance and after a VERY thorough cleaning with carb cleaning while cycling the ignition as well, she idles OK for 10-20 seconds and then starts coughing/backfire big time till it stalls. So I think the next step is to replace the IAC but just wanted to do a sanity check with some of the old salts out there. Attached video of her getting sick, is this what a bad IAC will do? Runs fine at RPM but down at idle she acts like the video. Thanks for any and all input.
https://youtu.be/wCpwT5hf5hk
https://youtu.be/wCpwT5hf5hk
I would say Check for any Loose Vacuum Hoses or missing Vacuum plugs/caps Before you purchase that New IAC.
Tourer
Joined: Jan 2014
Posts: 328
Likes: 16
From: Manassas, VA
Sounded like my '07 Street Bob. I cleaned the IAC good and I haven't had any issues since, I used seafoam in the aerosol can and sprayed it up good both off and running.
Last edited by jricharc; Feb 19, 2018 at 03:43 PM.
Tourer
Joined: Jul 2007
Posts: 290
Likes: 21
From: Portland Oregon
I just started experiencing the same thing on my 07 SB. I'd roll to a stop, pull in the clutch and the idle would dip so low that the bike would die. I searched the Internet and found a similar post on another site. Someone recommended cleaning the IAC unit, which solved the problem for me. At least it's been a couple of hundred miles since cleaning and \\;smooth running. Pull your air cleaner, on the throttle body top left you'll see a hole. Without starting your bike, turn the run switch on and turn the ignition key without hitting the actual start button. You'll hear the fuel pump priming and if you look in the IAC hole you'll see the plunger moving in and out. Put a paper towel in the throttle body out side the butterfly to catch excess cleaner and spray in the hole. I used WD40. After spraying, I used a cotton swab to blot the hole and it was dirty. The apparent trick is to cycle the start procedure several times to get the plunger moving. I hope it works for you as it did for me.
 \\;
Ron
 \\;
Ron
I used brake cleaner to spray into the IAC.
While I was in the area I poured about 2 ounces of transmission fluid down the manifold throat into the cylinders, started the engine up, let it idle for a few seconds and then turned it off and let it sit for a few hours to let the transmission fluid do some cleaning/carbon deposit loosening on the inside of the motor.
Fired the engine back up a few hours later, Smoked heavily for a few minutes and took about 20 minutes of slow riding around the neighborhood to completely stop smoking. Carbon deposits should be fairly well cleaned out and help the engine run its Best.
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Had idling issues start last riding season and thanks to this forum tried the carb cleaner routine and sure nuff got her running almost like new. Well it has come back with a vengeance and after a VERY thorough cleaning with carb cleaning while cycling the ignition as well, she idles OK for 10-20 seconds and then starts coughing/backfire big time till it stalls. So I think the next step is to replace the IAC but just wanted to do a sanity check with some of the old salts out there. Attached video of her getting sick, is this what a bad IAC will do? Runs fine at RPM but down at idle she acts like the video. Thanks for any and all input.
https://youtu.be/wCpwT5hf5hk
https://youtu.be/wCpwT5hf5hk
I had read on this forum that a possible reason was the fuel pump but that did not make sense to me as the issue was really at idle when you would think fuel demand is low. When I would get on it she would run fine at high rpm so the issue being the fuel pump was way down my list of things it could be. Well to make a long story short I just had it in the dealer and had them do a fuel pressure check and sure enough I was getting low fuel pressure. So put in a new fuel pump today and WOW! Fired up on the first crank and stayed running, no cough/stumble during warm up and she ran a whole lot better. The icing on the cake is that the decel pop was back to its normal rumble. Not sure how the fuel pump affects the decel pop but not complaining.
Hope this helps others with the same issue.
Ride Safe!
HDF Community Team
Joined: Aug 2018
Posts: 3,041
Likes: 1,212
From: New Hampsha
Decel popping comes from lean mixture and low fuel pressure causes lean mixture...
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