Ignition/Tuner/ECM/Fuel Injection Need advice on ignition issues? Questions about a tuner? Have questions about a EFI calibration or Fuel Injection? Tips on Engine Diagnostics, how to get codes, and what they mean. Find your answers here.

Ignition Coil Ohm Reading

Thread Tools
 
Search this Thread
 
Old Dec 27, 2023 | 04:50 PM
  #1  
Heritage666's Avatar
Heritage666
Thread Starter
|
Intermediate
Joined: Aug 2015
Posts: 30
Likes: 1
From: Arizona
Default Ignition Coil Ohm Reading

Howdy all, question for all the gurus.

I’ve got a a stock 2007 FLHR and I’m testing the stock single fire ignition coil. I’ve got .5 on one pin and .9 on the other. I know it’s supposed to read between .5 and .7 but is this a tell tale sign of a faulty coil?

Thanks for the help in advance.
 
Reply
Old Dec 28, 2023 | 08:53 AM
  #2  
98hotrodfatboy's Avatar
98hotrodfatboy
Seasoned HDF Member
15 Year Member
Liked
Loved
Joined: Mar 2010
Posts: 21,116
Likes: 7,640
From: Poolville
Default

Deleted..
 

Last edited by 98hotrodfatboy; Dec 28, 2023 at 08:55 AM.
Reply
Old Dec 28, 2023 | 09:04 AM
  #3  
Rounders's Avatar
Rounders
Seasoned HDF Member
Community Builder
Liked
Loved
Community Favorite
Joined: Mar 2021
Posts: 18,460
Likes: 3,723
From: backwoods
Default

What I can tell you is, I have had the ohm good, and fail periodically. Heat or vibration I don't know.

What is going on?

I am replacing my 07 this winter based on age, when I have tank off
 
Reply
Old Dec 28, 2023 | 10:34 AM
  #4  
Heritage666's Avatar
Heritage666
Thread Starter
|
Intermediate
Joined: Aug 2015
Posts: 30
Likes: 1
From: Arizona
Default

Thanks for the reply, been chasing an intermittent stutter at mid rpm’s for a while now. Hopefully this is the culprit. Ordered ignition, wires, and plugs. Fingers crossed!
 
Reply
Old Dec 28, 2023 | 10:51 AM
  #5  
Rounders's Avatar
Rounders
Seasoned HDF Member
Community Builder
Liked
Loved
Community Favorite
Joined: Mar 2021
Posts: 18,460
Likes: 3,723
From: backwoods
Default

It is a 17 year old bike,can't hurt.
 
Reply
Old Dec 29, 2023 | 10:41 PM
  #6  
Max Headflow's Avatar
Max Headflow
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,929
Likes: 8,033
From: poway
Default

Originally Posted by Heritage666
Howdy all, question for all the gurus.

I’ve got a a stock 2007 FLHR and I’m testing the stock single fire ignition coil. I’ve got .5 on one pin and .9 on the other. I know it’s supposed to read between .5 and .7 but is this a tell tale sign of a faulty coil?

Thanks for the help in advance.
Nope you probably measured across the wrong 2 pins to get the 0.9 ohms. A random miss ain't caused by a bad coil unless the motor is really erratic.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
captaintag
Ignition/Tuner/ECM/Fuel Injection
1
Aug 14, 2021 07:35 AM
astark
EVO
2
Aug 2, 2013 12:29 AM
jfsgb
Shovelhead
4
May 10, 2012 11:59 AM
harleymark
Ignition/Tuner/ECM/Fuel Injection
0
Mar 4, 2009 08:32 PM
rlbfxe
Dyna Glide Models
1
Aug 25, 2008 06:36 PM




All times are GMT -5. The time now is 08:20 PM.

story-0
7 Times Harley-Davidson Chucked Tradition Out the Window

Slideshow: Harley-Davidson built its reputation on nostalgia, but every so often, the company took a hard left turn into the future.

By Verdad Gallardo | 2026-05-20 11:18:19


VIEW MORE
story-1
7 Surprising Harley-Davidson Products that Are Not Motorcycles

Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.

By Verdad Gallardo | 2026-04-29 16:50:35


VIEW MORE
story-2
8 Best Harley-Davidson Motorcycles Ever

Slideshow: Not every Harley gets it right, but these are the ones that genuinely earned their reputation.

By Pouria Savadkouei | 2026-04-15 14:23:21


VIEW MORE
story-3
10 Worst Harley-Davidson Motorcycles Ever

Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.

By Pouria Savadkouei | 2026-04-01 20:01:09


VIEW MORE
story-4
Killer Custom's Jail Break Is The Breakout That Refused to Blend In

Slideshow: Killer Custom's "Jail Breaker" build focuses more on stance and visual aggression than mechanical overhaul.

By Verdad Gallardo | 2026-03-18 19:20:32


VIEW MORE
story-5
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.

By Verdad Gallardo | 2026-03-07 16:15:30


VIEW MORE
story-6
Harley-Davidson Reveals Super Cool Cafe Racer Concept

Slideshow: Harley-Davidson's new RMCR concept revives the café racer formula with modern hardware-and it may be exactly the reset the company needs.

By Verdad Gallardo | 2026-03-04 12:23:37


VIEW MORE
story-7
Engraved Rebellion: Inside Bundnerbike's Glam Rock II

Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.

By Verdad Gallardo | 2026-02-24 18:19:44


VIEW MORE
story-8
10 Motorcycles You Should Never Buy

Slideshow: There is no shortage of great motorcycles to buy, but we would avoid these ten.

By Joe Kucinski | 2026-02-19 14:50:51


VIEW MORE
story-9
10 Things Harley-Davidson Needs to Fix in 2026

Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.

By Verdad Gallardo | 2026-01-13 18:33:17


VIEW MORE