Engine issue
Road Master
Joined: Aug 2006
Posts: 1,148
Likes: 157
From: Banning, CA
Most fuel system cleaners don' do jack but this Redline cleaner really works. This and a new set of spark plugs and I'll bet you'll
be good to go - just my experience from a real old guy.
You don't need a case but I do give away to friends that experience similar problems - 4 oz per tank full. Car stuff is exactly the same.
be good to go - just my experience from a real old guy.
You don't need a case but I do give away to friends that experience similar problems - 4 oz per tank full. Car stuff is exactly the same.
Advanced
Joined: Oct 2018
Posts: 74
Likes: 2
From: Hendersonville NC
My 05 RoadKing had the same issue and it turned out to be a bad spark plug wire. Was intermittent with no set time it would happen ... checked plugs all looked good. On way to Fla. About a 600 mile run it got worse and worse until it finally stopped fireing with about 50 miles left on the trip...no cuts in wire, no signs of wear..replaced the wires with a new set of screaming eagles. Cured the problem...I also thoght it was bad gas as my daughter got some bad gas at the same station i did, she got regular though,
Last edited by Drgon63; Apr 23, 2019 at 11:57 AM.
Club Member
Joined: Apr 2013
Posts: 7,683
Likes: 8,415
From: Utah
Check for DTC's
https://www.fuelmotousa.com/p-29661-...es.html#pcodes
I never felt any misses but would get P1356 & 1358. Changed the plugs and no problems. I use OEM Plugs so I wouldn't have any problem with the Ion sensing.
https://www.fuelmotousa.com/p-29661-...es.html#pcodes
I never felt any misses but would get P1356 & 1358. Changed the plugs and no problems. I use OEM Plugs so I wouldn't have any problem with the Ion sensing.
Road Captain
Joined: Jul 2011
Posts: 516
Likes: 30
From: SoCal/Show Low, Az
Like the advise above, sounds like it could be an intermittent electrical problem. Like said above, my buddy had his battery connection come loose and caused something very similar to what you are describing.
Tourer
Joined: Sep 2016
Posts: 368
Likes: 37
From: Montgomery, Alabama
TPS but that would mean you would experience a "dead" or wonky spot as you accelerate. I'd check the plug lines first. There could be an issue as they heat up a bit. Could be the coil pack as well. I've only seen it once where it was hit/miss firing though. Obviously whatever is causing the issue is at higher rpm's and a stable throttle. So it could be heat/vibration related. It could also be bad gas, maybe a sticky injector or fuel filter. Higher RPM's running at a constant speed will suck a lot of gas. If you really roll on the throttle from a stop to 5 do you notice any hiccups then? Does it feel like it's running hotter than usual (lean)?
Last edited by soulpatch; Apr 23, 2019 at 06:05 PM.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
Jason Momoa Is Turning Classic Harleys Into PHEVs
Verdad Gallardo
Harley-Davidson Fat Boy Becomes a Dark, Decepticon-Inspired Custom
Verdad Gallardo
6 Weirdest Harley-Davidsons Ever Sold to the Public
Verdad Gallardo
7 Times Harley-Davidson Chucked Tradition Out the Window
Verdad Gallardo
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
Thread Starter
|
Novice
Joined: Mar 2017
Posts: 17
Likes: 1
From: Central Louisiana
TPS but that would mean you would experience a "dead" or wonky spot as you accelerate. I'd check the plug lines first. There could be an issue as they heat up a bit. Could be the coil pack as well. I've only seen it once where it was hit/miss firing though. Obviously whatever is causing the issue is at higher rpm's and a stable throttle. So it could be heat/vibration related. It could also be bad gas, maybe a sticky injector or fuel filter. Higher RPM's running at a constant speed will suck a lot of gas. If you really roll on the throttle from a stop to 5 do you notice any hiccups then? Does it feel like it's running hotter than usual (lean)?