C7 Tech/Performance Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

2019 GS issues

Thread Tools
 
Search this Thread
 
Old Nov 7, 2019 | 07:46 PM
  #1  
jmhtx's Avatar
jmhtx
Thread Starter
6th Gear
 
Joined: Nov 2019
Posts: 6
Likes: 0
From: Texas
Default 2019 GS issues

Hello.... (first post)
Bought a 2019 GS in June,
5 months later, it has 3,600 miles on it, completely stock.
Decided to go for a spin on Tuesday & got maybe 5 miles down the road & car started kinda hopping, running & handling rough...
rear axle warning came on followed by stabil track, then service engine warning light flashing.
Car was running rough but got it in to the local dealer.
Yesterday service manager calls & says, looks like it's maybe firing on one cylinder.
They are conversing with GM. TODAY (THURSDAY) I get a call that they are going to START tests on Friday!
I have searched the forums for like situations & coming up empty for this exact situation.
ANYONE out there dealt with this & have any insight PLEASE??? Frustrated! Thanks!!

Last edited by jmhtx; Nov 7, 2019 at 07:53 PM.
Reply
Old Nov 8, 2019 | 08:23 AM
  #2  
Zjoe6's Avatar
Zjoe6
Race Director
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Aug 2015
Posts: 12,222
Likes: 4,713
From: SE WI
Default

Hopefully they can just swap out the ECM and you’re good to go. No idea what that could be. Something simple would be great.
Reply
Old Nov 8, 2019 | 10:11 AM
  #3  
laserdude2215's Avatar
laserdude2215
Burning Brakes
Photogenic
Liked
Top Answer: 1
Top Answer: 3
 
Joined: Nov 2016
Posts: 1,189
Likes: 436
From: San Dimas CA
Default

Not possible to fire on one cylinder and run at all.
Reply
Old Nov 8, 2019 | 10:27 AM
  #4  
jmhtx's Avatar
jmhtx
Thread Starter
6th Gear
 
Joined: Nov 2019
Posts: 6
Likes: 0
From: Texas
Default

Originally Posted by Zjoe6
Hopefully they can just swap out the ECM and you’re good to go. No idea what that could be. Something simple would be great.
I sure hope so, 4 days later, they are finally going to start some "testing"
Reply
Old Nov 8, 2019 | 10:28 AM
  #5  
jmhtx's Avatar
jmhtx
Thread Starter
6th Gear
 
Joined: Nov 2019
Posts: 6
Likes: 0
From: Texas
Default

Originally Posted by laserdude2215
Not possible to fire on one cylinder and run at all.
Hoping we get some answers today.
Reply
Old Nov 8, 2019 | 02:05 PM
  #6  
Kevin A Jones's Avatar
Kevin A Jones
Race Director
Conversation Starter
Liked
Loved
Community Favorite
 
Joined: Apr 2017
Posts: 13,599
Likes: 12,857
From: Virginia
Default

More than likely, it was not firing on one cylinder, as already stated it would never run on just one cylinder.
Reply
Old Nov 8, 2019 | 06:24 PM
  #7  
jmhtx's Avatar
jmhtx
Thread Starter
6th Gear
 
Joined: Nov 2019
Posts: 6
Likes: 0
From: Texas
Default

Originally Posted by Kevin A Jones
More than likely, it was not firing on one cylinder, as already stated it would never run on just one cylinder.
That was my typo... misfiring on 1 cylinder. #2
Reply
Old Nov 8, 2019 | 07:14 PM
  #8  
RonC7's Avatar
RonC7
Safety Car
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2012
Posts: 3,834
Likes: 1,852
From: St. Louis Metro East IL
Default

Misfire could be as simple as a loose plug wire, bad spark plug, bad wire, or bad coil.

GL
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

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

 Joe Kucinski
story-1

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

 Verdad Gallardo
story-2

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

 Joe Kucinski
story-3

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

 Verdad Gallardo
story-4

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-5

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-6

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-7

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
story-8

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

 Joe Kucinski
story-9

10 Most Common Corvette Problems of the Last 20 Years!

 Joe Kucinski
Old Nov 8, 2019 | 07:44 PM
  #9  
jmhtx's Avatar
jmhtx
Thread Starter
6th Gear
 
Joined: Nov 2019
Posts: 6
Likes: 0
From: Texas
Default

Originally Posted by RonC7
Misfire could be as simple as a loose plug wire, bad spark plug, bad wire, or bad coil.

GL
Still running tests, latest is might be a bad injector.
Reply
Old Nov 8, 2019 | 07:46 PM
  #10  
24/Eray's Avatar
24/Eray
Race Director
15 Year Member
Community Builder
Loved
Community Favorite
 
Joined: Oct 2008
Posts: 16,610
Likes: 7,693
From: NJ
Default

Bad plug. Hairline crack in ceramic. All the right symptoms for it.
Reply
Old Nov 12, 2019 | 09:03 AM
  #11  
Zjoe6's Avatar
Zjoe6
Race Director
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Aug 2015
Posts: 12,222
Likes: 4,713
From: SE WI
Default

Any word back yet?
Reply
Old Nov 12, 2019 | 02:01 PM
  #12  
FX VETTE's Avatar
FX VETTE
Team Owner
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Jul 2016
Posts: 25,303
Likes: 1,683
From: The Steel City, Colorful Colorado
Winner 2020 C7 of the Year - Modified
Default

Reply
Old Nov 13, 2019 | 11:06 AM
  #13  
Cicerone's Avatar
Cicerone
Advanced
 
Joined: Nov 2019
Posts: 63
Likes: 5
Default

So sorry to hear. Please update us as this is concerning.
Reply
Old Nov 13, 2019 | 11:07 AM
  #14  
jmhtx's Avatar
jmhtx
Thread Starter
6th Gear
 
Joined: Nov 2019
Posts: 6
Likes: 0
From: Texas
Default

Originally Posted by Zjoe6
Any word back yet?
After 1 week in the shop & a number of tests.... it turns out it was a bad spark plug!
Thanks to those that suggested what the issue could be.
Happy it wasn't anything serious.
Reply

Get notified of new replies

To 2019 GS issues





All times are GMT -4. The time now is 03:47 AM.

story-0
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-1
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-2
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-3
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-4
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
story-5
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-6
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-7
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-8
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE
story-9
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE