My bob is still stuttering
Seasoned HDF Member
Joined: Jul 2008
Posts: 9,282
Likes: 1,139
From: southeast PA
HD manual recommends using propane torch (unlit). So you can use that. People use carb cleaner, WD40, brake cleaner and all kinds of stuff to detect leaks. I just gave you the safest chemicals. All you're doing is seeing if the leak will suck the spray inside. If you want to find something else, feel free.
What you need to do, besides getting a service manual, is to spend some time and do some research online. Plenty of posts, forums and YouTube to look at.
What you need to do, besides getting a service manual, is to spend some time and do some research online. Plenty of posts, forums and YouTube to look at.
Seasoned HDF Member
Joined: Jul 2008
Posts: 9,282
Likes: 1,139
From: southeast PA
That is not an air filter, that's the IAC. The air filter is not even installed in the video.
But, I think that copious amounts of alcohol would be in order. So, props to Suede Blue Man.
But, I think that copious amounts of alcohol would be in order. So, props to Suede Blue Man.
Thread Starter
|
Tourer
Joined: Jun 2020
Posts: 477
Likes: 31
From: moon
so i checked IAC around the flap, it was dirty but I clened it with paper towel...so nothing permanent sticking there....
also checked speed seonsor if there are any filings....nothing.....
removed power commander 5 and run it without, same stuttering...nothing changed....so PC5 is not the culprit
I guess it could be intake manifold leaks?????
I also cleaned air filter.....
also checked speed seonsor if there are any filings....nothing.....
removed power commander 5 and run it without, same stuttering...nothing changed....so PC5 is not the culprit
I guess it could be intake manifold leaks?????
I also cleaned air filter.....
Last edited by falikmike; Jul 24, 2020 at 04:57 AM.
Seasoned HDF Member
Joined: Jul 2008
Posts: 9,282
Likes: 1,139
From: southeast PA
The IAC is not the flap. It is inside the throttle body opening near the top. It only affects the idle, but it can't hurt to clean it.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Thread Starter
|
Tourer
Joined: Jun 2020
Posts: 477
Likes: 31
From: moon
i cleaned it with alcohol.....so idle is now ok I think but low rpm is still bad
in harley service they told me they use break cleaner to clean the sensor....and other say that is too harsh....
i need to check valva intake leaks.....i have small lighter gas cans that I use to fill cigarette lighters....will that help?
in harley service they told me they use break cleaner to clean the sensor....and other say that is too harsh....
i need to check valva intake leaks.....i have small lighter gas cans that I use to fill cigarette lighters....will that help?
Tourer
Joined: May 2012
Posts: 335
Likes: 89
From: Reno, NV
I had a stuttering issue years ago and I hosed off the IAC and everything else in the TB with WD40 and that solved the issue. Made the exhaust smell like burning WD40 for a few minutes. It would also be worth it to remove the CPS (crank position sensor) and wipe that off. Not likely the culprit, but it's an easy 5 minute job.
There's also a known issue with the in tank fuel line rubbing against the inside of the tank wearing small hole(s) in the line causing low fuel pressure. I had this issue too. But I thought by 2014, they (HD) fixed that, but maybe not. Only way to find out is to test the fuel pressure or remove the fuel pump assembly and inspect the lines. Look for flat spots on the corrugated plastic line that goes from the pump to the regulator.
There's also a known issue with the in tank fuel line rubbing against the inside of the tank wearing small hole(s) in the line causing low fuel pressure. I had this issue too. But I thought by 2014, they (HD) fixed that, but maybe not. Only way to find out is to test the fuel pressure or remove the fuel pump assembly and inspect the lines. Look for flat spots on the corrugated plastic line that goes from the pump to the regulator.
