Harley Davidson Forums

EVO All Evo Model Discussion

Engine missfire

Thread Tools
 
Search this Thread
 
Old Apr 26, 2008 | 08:33 PM
Share
  #1  
mpete's Avatar
mpete
Thread Starter
|
3rd Gear
Joined: Apr 2008
Posts: 7
Likes: 0
Default Engine missfire
Engine missfire got progresively worse. Replaced plugs, leads. would run on 1 cyl, pull lead away from plug,run fine on 2 cyl. Stock ign system. compressiion good, new intake gaskets, carby cleaned, voes working properly. Coil, pickup, wiring and module test OK as instuctions in manual. Fit new plugs run good. 3 mile ride in city to work, after 2 days starts to missfire again. Check plugs and clean (only fine deposits normal for unleaded fuel) runs good for couple of days again. Pinpoints to weak spark but coil tests within specs. Tried heating pickup and module with no difference.Idont think it is heat related, if bike is parked and then started next day still has missfire untill plugs are cleaned again. Starting to suspect module.any ideas would be appreciated.
 
Reply
0
Old Apr 26, 2008 | 08:37 PM
Share
  #2  
t150vej's Avatar
t150vej
HDF Community Team
20 Year Member
Community Favorite
Top Answer: 3
Joined: Dec 2005
Posts: 5,402
Likes: 2,605
From: NC USA
Community Team
Default RE: Engine missfire
What year bike?
 
Reply
0
Old Apr 26, 2008 | 09:18 PM
Share
  #3  
mpete's Avatar
mpete
Thread Starter
|
3rd Gear
Joined: Apr 2008
Posts: 7
Likes: 0
Default RE: Engine missfire
Sorry about that, 99 evo, dual fire ign system
 
Reply
0
Old Apr 27, 2008 | 01:54 AM
Share
  #4  
RICHE's Avatar
RICHE
Tourer
Joined: Jan 2007
Posts: 264
Likes: 2
From:
Default RE: Engine missfire
Sounds like the module to me.Sometimes you just dont know for sure.Throw some parts at it.
 
Reply
0
Old Apr 27, 2008 | 08:26 AM
Share
  #5  
jhnmflr's Avatar
jhnmflr
Outstanding HDF Member
Joined: Jul 2005
Posts: 2,890
Likes: 0
From: Sw Florida
Default RE: Engine missfire
Agree , new module should do the trick
 
Reply
0
Old May 6, 2008 | 07:24 AM
Share
  #6  
mpete's Avatar
mpete
Thread Starter
|
3rd Gear
Joined: Apr 2008
Posts: 7
Likes: 0
Default RE: Engine missfire
Fitted a Screamin Eagle module tonight. Forecast for rain in Adelaide for the next few days, hopefully I can go for a ride on the weekend.
 
Reply
0
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Ignition Module Testing
Crimson King
Ignition/Tuner/ECM/Fuel Injection
16
Feb 9, 2017 12:45 AM
Bike Idles but won't run under load? Ignition Coil or Something Else?
Daniel Miller
Ignition/Tuner/ECM/Fuel Injection
0
Jul 7, 2015 09:06 AM
No Spark! Coil? Module?
LeFat1
Ignition/Tuner/ECM/Fuel Injection
6
May 15, 2013 03:16 PM
Help! Ignition module problem?re, dual coil, Crane HI-4 ignition.
zenwarrior
Ignition/Tuner/ECM/Fuel Injection
4
May 19, 2007 11:21 AM
93 XLH1200 Ignition/Starting issues
Dworrakk
Ignition/Tuner/ECM/Fuel Injection
4
Apr 4, 2006 12:07 AM
Back to Subforum
EVO
View Next Unread
Still not running right




Advanced Search
Reply Closed Thread Share
Forum Jump

All times are GMT -5. The time now is 03:23 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