EVO All Evo Model Discussion

Spark plug wire resistance specification ?

Thread Tools
 
Search this Thread
 
  #1  
Old 07-05-2014, 07:23 PM
Delawaredave's Avatar
Delawaredave
Delawaredave is offline
Novice
Thread Starter
Join Date: Oct 2009
Posts: 24
Likes: 0
Received 0 Likes on 0 Posts
Default Spark plug wire resistance specification ?

Newbie. I did a search. I have the manual. I cannot find a resistance specification for the plug wires.

Engine running very rough. Just replaced coil. Sprayed intake with WD-40 and I don't seem to see a change in engine RPM when I spray around intake manifold (but the damn thing is running so rough I might not be able to tell).

Measured the wires: Front is 3000 ohms for 4.5", Rear is 6200 ohms for 15". This computes to about 5000-8000 ohms per foot, or 400-600 ohms per inch.

Doesn't seem bad.

Someone said there's some "night test" where you run bike at night look for sparks coming through insulation gaps ?

Waiting for nightfall....... Thanks for your help !
 

Last edited by Delawaredave; 07-05-2014 at 08:03 PM.
  #2  
Old 07-05-2014, 09:09 PM
HarDlife's Avatar
HarDlife
HarDlife is offline
Road Warrior
Join Date: Jul 2013
Location: Florida
Posts: 1,476
Likes: 0
Received 5 Likes on 4 Posts
Default

Specs in my FSM are 250-583 ohms per inch.
 
  #3  
Old 07-05-2014, 09:29 PM
Delawaredave's Avatar
Delawaredave
Delawaredave is offline
Novice
Thread Starter
Join Date: Oct 2009
Posts: 24
Likes: 0
Received 0 Likes on 0 Posts
Default

Thanks ! Wires don't seem to be shorting - sprayed with water, ran screwdriver along them while running at night.

Still probsbkly should replace plugs and wires to eliminate.

Thanks for your help !
 
  #4  
Old 07-05-2014, 09:29 PM
01fxdxt's Avatar
01fxdxt
01fxdxt is offline
Stellar HDF Member
Join Date: Jul 2010
Posts: 2,140
Received 124 Likes on 93 Posts
Default

Eliminate any doubt.A set of stock wires cost a bit more than $10-NO BRAINER.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Ndoggct
Touring Models
14
09-21-2016 07:02 PM
apetterez
Dyna Glide Models
11
12-12-2014 11:30 PM
SwiftyBKells
Ignition/Tuner/ECM/Fuel Injection
9
03-30-2013 04:44 AM
Keith_71
Softail Models
5
07-30-2011 05:35 PM
harleybodei
General Harley Davidson Chat
18
12-19-2007 05:54 PM



Quick Reply: Spark plug wire resistance specification ?



All times are GMT -5. The time now is 11:23 AM.