Off to the dealership I guess...
Seasoned HDF Member
Joined: Sep 2017
Posts: 12,218
Likes: 4,929
From: England
I think you need to backup here. The problem was there as a stock bike. I think you need to fix it as a stock bike and not kludge it with modifying the map to hide the problem.
I would try HD plugs.
Make certain you don't have any leaks in the inlet or exhaust.
I would try HD plugs.
Make certain you don't have any leaks in the inlet or exhaust.
Last edited by Andy from Sandy; Jun 2, 2024 at 04:35 PM.
Seasoned HDF Member
Joined: Sep 2007
Posts: 9,741
Likes: 1,598
From: Danbury CT
I will look into sending the MAP to V&H for them to make changes to. As far as the iridium plugs, I've ran them in the last 3 or 4 bikes I've owned and had zero problems with them. I've found that carbed bikes do warm up quicker on cold days with iridiums.
I don't believe there is any adjustment on throttle settings on my '17 Sportster. It has throttle cables, it is not 'fly by wire'.
Keep in mind the throttle issue was there when the bike was completely stock with factory HD plugs in it.
I don't believe there is any adjustment on throttle settings on my '17 Sportster. It has throttle cables, it is not 'fly by wire'.
Keep in mind the throttle issue was there when the bike was completely stock with factory HD plugs in it.
Are you sure the throttle cables are adjusted properly? You stated there aren't any throttle settings on your 17 Sportster but there are. The cables need to be adjusted correctly or you will have a choppy throttle response.
Thread Starter
|
Seasoned HDF Member
Joined: Aug 2017
Posts: 7,528
Likes: 12,142
From: Indianapolis
The bike had HD plugs in it when I bought it back in December, the throttle issue was a problem then too, so it cannot be blamed on the iridium plugs. Besides, I've owned several bikes running the iridium plugs with ZERO problems.
I plan on testing for intake and exhaust leaks.
Thread Starter
|
Seasoned HDF Member
Joined: Aug 2017
Posts: 7,528
Likes: 12,142
From: Indianapolis
That's one of the first things I checked and adjusted.
Seasoned HDF Member
Joined: Sep 2017
Posts: 12,218
Likes: 4,929
From: England
What I meant was if you sent the map to V& H and told them it's running lean just off idle that would be at odds with other bikes where the map is good. If they tweak it, that might hide the actual problem.
Road Master
Joined: Jun 2018
Posts: 757
Likes: 365
From: Winnipeg
I just checked for any codes. I did find in the BCM a u0100 code was set. Says "lost communications with the ECM." That's the second time that has happened, seems both times were when I flashed the bike with the FP3.
Seems strange I had no check engine light though.
Funny thing is, it never did that when I flashed the 883.
I also reflashed the bike with the tuner and the same MAP to see if something was going on with it the first time I downloaded it.
I checked the plug wires, both are are connected good at the coil and plugs.
Seems strange I had no check engine light though.Funny thing is, it never did that when I flashed the 883.
I also reflashed the bike with the tuner and the same MAP to see if something was going on with it the first time I downloaded it.
I checked the plug wires, both are are connected good at the coil and plugs.
Seasoned HDF Member
Joined: Sep 2007
Posts: 9,741
Likes: 1,598
From: Danbury CT
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
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
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider
Verdad Gallardo
Thread Starter
|
Seasoned HDF Member
Joined: Aug 2017
Posts: 7,528
Likes: 12,142
From: Indianapolis
Success...
I contacted V&H, and explained the issue I was having. All he needed was the last 6 digits of the VIN to look up what MAP I had flashed the bike with, then made some modifications to it.
What he did was just richen up the mixture at lower rpm/throttle settings, and some on the upper end because of the slight surge I could feel at times at Interstate speeds.
I basically called it, the bike was simply running WAY too lean. The bike runs fine now!
I contacted V&H, and explained the issue I was having. All he needed was the last 6 digits of the VIN to look up what MAP I had flashed the bike with, then made some modifications to it.
What he did was just richen up the mixture at lower rpm/throttle settings, and some on the upper end because of the slight surge I could feel at times at Interstate speeds.
I basically called it, the bike was simply running WAY too lean. The bike runs fine now!
Seasoned HDF Member
Joined: Sep 2017
Posts: 12,218
Likes: 4,929
From: England
With some effort comparing the various tables you will find the changes made. It might be an interesting exercise to learn more about how efi works.
I wonder if it's all done in the VE tables?
I wonder if it's all done in the VE tables?