C6 Tech/Performance LS2, LS3, LS7, LS9 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

spark plug lead comes off plug

Thread Tools
 
Search this Thread
 
Old Mar 17, 2015 | 07:56 AM
  #1  
lancesavage's Avatar
lancesavage
Thread Starter
Navigator
 
Joined: Feb 2014
Posts: 9
Likes: 0
Default spark plug lead comes off plug

Had an issue with a plug lead coming off. Ran for about an hour noticing engine was sluggish.
After an hour of running a check engine light came on and a message saying service ride control.
Pulled over to inspect and found a plug lead had come completely off.
Reattached and message went away but still have check engine light on (not flashing).
Ideas ? Engines seems to be running fine

A friend of mine says he has an ongoing problem with a plug lead coming off but says once reattached, check engine light goes out.

Never had problems with plug leads coming off. Is this a normal issue with newer vetted ?

2013 427 vert
Reply
Old Mar 17, 2015 | 08:11 AM
  #2  
Dano523's Avatar
Dano523
Race Director
10 Year Member
Community Builder
Community Influencer
Top Answer: 1
 
Joined: Dec 2013
Posts: 12,502
Likes: 3,629
Default

If you are not coating the inside of the plug wire boots with a light layer of dielectric grease, then yes normal for the plug wires to not be fully snapped in place to begin with or stay snapped in.

Hence the very end of the boot get stuck to the plug as you are sliding it down on the plug, and when you push the wire on the plug so semi clip it in place, it compresses the rubber boot longways to hold a tension, and this and built up air pressure in the boot causes the top connector part of the boot to lift back up and unplug the connector.

So dielectric grease and a Q tip to apply a light coat to the inside of the boots is the the answer to the problem.

Last edited by Dano523; Mar 17, 2015 at 08:18 AM.
Reply
Old Mar 17, 2015 | 12:29 PM
  #3  
lancesavage's Avatar
lancesavage
Thread Starter
Navigator
 
Joined: Feb 2014
Posts: 9
Likes: 0
Default

Originally Posted by Dano523
If you are not coating the inside of the plug wire boots with a light layer of dielectric grease, then yes normal for the plug wires to not be fully snapped in place to begin with or stay snapped in.

Hence the very end of the boot get stuck to the plug as you are sliding it down on the plug, and when you push the wire on the plug so semi clip it in place, it compresses the rubber boot longways to hold a tension, and this and built up air pressure in the boot causes the top connector part of the boot to lift back up and unplug the connector.

So dielectric grease and a Q tip to apply a light coat to the inside of the boots is the the answer to the problem.
ok thanks. I guess what I am asking is whether anyone else has had this happen straight from the factory. I have never had a plug lead ever come off a vehicle. I will do what you recommend and see if it holds.
Reply
Old Mar 17, 2015 | 12:33 PM
  #4  
timd38's Avatar
timd38
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Aug 2005
Posts: 13,592
Likes: 187
From: Hudson WI
NCM Sinkhole Donor
Default

You can either clear the code or after "x" amount of cycles it will go off. I don't know what "x" is.
Reply
Old Mar 17, 2015 | 01:33 PM
  #5  
lancesavage's Avatar
lancesavage
Thread Starter
Navigator
 
Joined: Feb 2014
Posts: 9
Likes: 0
Default

Originally Posted by timd38
You can either clear the code or after "x" amount of cycles it will go off. I don't know what "x" is.
Can you tell me how to clear the code or do I need to take to dealer?
Thanks for the help .
Reply
Old Mar 17, 2015 | 01:37 PM
  #6  
2k Cobra's Avatar
2k Cobra
Melting Slicks
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Aug 2000
Posts: 2,327
Likes: 44
From: Sacramento CA
Default

Originally Posted by lancesavage
Can you tell me how to clear the code or do I need to take to dealer?
Thanks for the help .
If you or a friend has a OBDII scan tool, that should clear it..
Reply
Old Mar 17, 2015 | 07:01 PM
  #7  
timd38's Avatar
timd38
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Aug 2005
Posts: 13,592
Likes: 187
From: Hudson WI
NCM Sinkhole Donor
Default

Originally Posted by lancesavage
Can you tell me how to clear the code or do I need to take to dealer?
Thanks for the help .
Come to my house and I will clear it for you.
Reply
Old Mar 17, 2015 | 07:41 PM
  #8  
C6z06man's Avatar
C6z06man
Drifting
10 Year Member
 
Joined: Sep 2012
Posts: 1,371
Likes: 19
From: Pittsburgh
Default

Or disconnect the battery for a few minutes.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-1

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-2

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-3

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-4

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-5

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-6

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-7

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-8

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-9

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
Old Mar 17, 2015 | 07:48 PM
  #9  
timd38's Avatar
timd38
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Aug 2005
Posts: 13,592
Likes: 187
From: Hudson WI
NCM Sinkhole Donor
Default

Originally Posted by C6z06man
Or disconnect the battery for a few minutes.
Does that still work?
Reply
Old Mar 18, 2015 | 12:39 PM
  #10  
lancesavage's Avatar
lancesavage
Thread Starter
Navigator
 
Joined: Feb 2014
Posts: 9
Likes: 0
Default

Originally Posted by C6z06man
Or disconnect the battery for a few minutes.
Yes but will that not delete other settings, say like radio,nav etc. ?
Reply

Get notified of new replies

To spark plug lead comes off plug





All times are GMT -4. The time now is 04:25 PM.

story-0
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-1
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-2
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-3
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-4
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-5
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-6
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-7
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-8
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-9
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE