Home 
Home Search search Menu menu Not logged in - Login | Register
> Jensen Healey & Jensen GT Tech > Ignition > Spark plugs not firing

 Moderated by: Greg Fletcher
New Topic Reply Printer Friendly
Spark plugs not firing  Rate Topic 
AuthorPost
 Posted: 11-02-2015 07:29 pm
  PM Quote Reply
1st Post
blawrence
Member
 

Joined: 12-08-2009
Location: North Carolina USA
Posts: 23
Status: 
Offline
I have been reading back to 2006 forum when members had issues with plugs not firing. My #4 stopped firing yesterday and I have checked plug wires and possible wire grounding. I am running petronix ignition with an MSD coil and Magnecor KV85 leads. My plugs are Champion RN9PYP, also states 7415 on plugs. Plug gaps are .035". When I remove #4 plug and rest on engine, it sparks OK and strobe light shows it is firing, but in the cylinder strobe light shows erratic or no spark. Has my MSD voltage damaged this plug? What is a better plug solution, please?

Back To Top PM Quote Reply  

 Posted: 11-02-2015 09:08 pm
  PM Quote Reply
2nd Post
answerman
Member
 

Joined: 09-10-2012
Location: Little Chute, Wisconsin USA
Posts: 435
Status: 
Offline
Maybe too simple of a test, but have you tried swapping a couple of the plugs? Pull #2 and #4 plugs out, swap them, connect the wires back up, and see if you're still getting the misfire on #4. If it's now on #2, it's the plug. If it's still on #4, then it's farther upstream.

Back To Top PM Quote Reply

 Posted: 11-02-2015 10:00 pm
  PM Quote Reply
3rd Post
blawrence
Member
 

Joined: 12-08-2009
Location: North Carolina USA
Posts: 23
Status: 
Offline
Had to stop work on it before trying your suggested move. Will be back on it tomorrow.

Back To Top PM Quote Reply  

 Posted: 04-16-2020 11:41 pm
  PM Quote Reply
4th Post
noomg
Member
 

Joined: 08-02-2018
Location: Long Beach, California USA
Posts: 458
Status: 
Offline
I guess tomorrow never came!

Back To Top PM Quote Reply

Current time is 05:37 am  
> Jensen Healey & Jensen GT Tech > Ignition > Spark plugs not firing Top




UltraBB 1.172 Copyright © 2007-2011 Data 1 Systems