C7 Shaking After Sitting
Thread Starter
Heel & Toe
Joined: Jul 2019
Posts: 16
Likes: 2
C7 Shaking After Sitting
Have a 2014 C7 Manual that I drove for the first time after winter to shake any cobwebs off and had a shake when accelerating. 53k miles. Put on about 4,000 a year.
This happens during any medium to hard acceleration at any speed. Turns on stabilitrak and rear axle service lights. Check engine light flashes as well. Oil change was last September. Axle/Trans fluid was about 12,000 miles ago.
Battery has always been on a tender so don't think its a battery issue. I've read from others it could be bad fuel from sitting, spark/injectors, etc. Just wanting to get the groups feedback.
UPDATES:
Codes are P0302 which is a cylinder 2 misfire. Going to replace the plugs and see how that works. Spark plug wires seem undamaged and fully seated on cylinder 2.
I did swap the coil driver from 2 to 4 and the issue did not move and is still on cylinder 2 so its at least not the coils.
Still going to get the plugs swapped (shopping prices right now because the dealer wants $704). I also don't want to drive it far on a misfire either.
This happens during any medium to hard acceleration at any speed. Turns on stabilitrak and rear axle service lights. Check engine light flashes as well. Oil change was last September. Axle/Trans fluid was about 12,000 miles ago.
Battery has always been on a tender so don't think its a battery issue. I've read from others it could be bad fuel from sitting, spark/injectors, etc. Just wanting to get the groups feedback.
UPDATES:
Codes are P0302 which is a cylinder 2 misfire. Going to replace the plugs and see how that works. Spark plug wires seem undamaged and fully seated on cylinder 2.
I did swap the coil driver from 2 to 4 and the issue did not move and is still on cylinder 2 so its at least not the coils.
Still going to get the plugs swapped (shopping prices right now because the dealer wants $704). I also don't want to drive it far on a misfire either.
Last edited by Richard Le Page; Mar 30, 2026 at 06:46 PM.
Racer
Joined: Jun 2013
Posts: 339
Likes: 126
From: Missouri
Have a 2014 C7 Manual that I drove for the first time after winter to shake any cobwebs off and had a shake when accelerating. 53k miles. Put on about 4,000 a year.
This happens during any medium to hard acceleration at any speed. Turns on stabilitrak and rear axle service lights. Check engine light flashes as well. Oil change was last September. Axle/Trans fluid was about 12,000 miles ago.
Battery has always been on a tender so don't think its a battery issue. I've read from others it could be bad fuel from sitting, spark/injectors, etc. Just wanting to get the groups feedback.
UPDATES:
Codes are P0302 which is a cylinder 2 misfire. Going to replace the plugs and see how that work, s. Spark plug wires seem undamaged and fully seated on cylinder 2.
I did swap the coil driver from 2 to 4 and the issue did not move and is still on cylinder 2 so its at least not the coils.
Still going to get the plugs swapped (shopping prices right now because the dealer wants $704). I also don't want to drive it far on a misfire either.
This happens during any medium to hard acceleration at any speed. Turns on stabilitrak and rear axle service lights. Check engine light flashes as well. Oil change was last September. Axle/Trans fluid was about 12,000 miles ago.
Battery has always been on a tender so don't think its a battery issue. I've read from others it could be bad fuel from sitting, spark/injectors, etc. Just wanting to get the groups feedback.
UPDATES:
Codes are P0302 which is a cylinder 2 misfire. Going to replace the plugs and see how that work, s. Spark plug wires seem undamaged and fully seated on cylinder 2.
I did swap the coil driver from 2 to 4 and the issue did not move and is still on cylinder 2 so its at least not the coils.
Still going to get the plugs swapped (shopping prices right now because the dealer wants $704). I also don't want to drive it far on a misfire either.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Instructor
Joined: Feb 2020
Posts: 167
Likes: 140
From: Shelby NC
Same issue solved
Good evening Richard,
Your issue sounds exactly what I had a few weeks ago. My 2015 ZO6 I just finished an oil change on I took it up the road the next day and it was missing very badly throwing a P0304 code and the stabil track lights as well. I did a bunch of research on here and decided to pull the number four plug.
it looks pretty good so I decided just to change all six plugs while I was in there and the spark plug wires. I also bought a coil but I ended up not needing it. I actually found the spec on the spark plug wires and checked it with my own meter and all the wires actually measured more resistance than what the book calls for so that made me order the MSD super conductor 8.5 mm plug wires as they are very low resistance. I figured if I was going to change them I might as well upgrade
long story short changed all the plugs and the spark plug wires and the problem went away. So you may want to take your own meter and check your spark plug wires and at least change that also. Just my experience.
if you have any more questions shoot me a message
thanks Jeff
Your issue sounds exactly what I had a few weeks ago. My 2015 ZO6 I just finished an oil change on I took it up the road the next day and it was missing very badly throwing a P0304 code and the stabil track lights as well. I did a bunch of research on here and decided to pull the number four plug.
it looks pretty good so I decided just to change all six plugs while I was in there and the spark plug wires. I also bought a coil but I ended up not needing it. I actually found the spec on the spark plug wires and checked it with my own meter and all the wires actually measured more resistance than what the book calls for so that made me order the MSD super conductor 8.5 mm plug wires as they are very low resistance. I figured if I was going to change them I might as well upgrade
long story short changed all the plugs and the spark plug wires and the problem went away. So you may want to take your own meter and check your spark plug wires and at least change that also. Just my experience.
if you have any more questions shoot me a message
thanks Jeff
Thread Starter
Heel & Toe
Joined: Jul 2019
Posts: 16
Likes: 2
Good evening Richard,
Your issue sounds exactly what I had a few weeks ago. My 2015 ZO6 I just finished an oil change on I took it up the road the next day and it was missing very badly throwing a P0304 code and the stabil track lights as well. I did a bunch of research on here and decided to pull the number four plug.
it looks pretty good so I decided just to change all six plugs while I was in there and the spark plug wires. I also bought a coil but I ended up not needing it. I actually found the spec on the spark plug wires and checked it with my own meter and all the wires actually measured more resistance than what the book calls for so that made me order the MSD super conductor 8.5 mm plug wires as they are very low resistance. I figured if I was going to change them I might as well upgrade
long story short changed all the plugs and the spark plug wires and the problem went away. So you may want to take your own meter and check your spark plug wires and at least change that also. Just my experience.
if you have any more questions shoot me a message
thanks Jeff
Your issue sounds exactly what I had a few weeks ago. My 2015 ZO6 I just finished an oil change on I took it up the road the next day and it was missing very badly throwing a P0304 code and the stabil track lights as well. I did a bunch of research on here and decided to pull the number four plug.
it looks pretty good so I decided just to change all six plugs while I was in there and the spark plug wires. I also bought a coil but I ended up not needing it. I actually found the spec on the spark plug wires and checked it with my own meter and all the wires actually measured more resistance than what the book calls for so that made me order the MSD super conductor 8.5 mm plug wires as they are very low resistance. I figured if I was going to change them I might as well upgrade
long story short changed all the plugs and the spark plug wires and the problem went away. So you may want to take your own meter and check your spark plug wires and at least change that also. Just my experience.
if you have any more questions shoot me a message
thanks Jeff
From sitting the winter I figured it might of fouled up the plugs or injector. Either way shouldn't be a 'horrible' fix.
Instructor
Joined: Aug 2021
Posts: 237
Likes: 118
From: Jacksonville Fl
If the misfire does not go away after you swap plugs, coil and wires, more than likely the injector is bad. Just replaced one on my c7 last week.
Before you spend the money on plugs and wires just swap the plug from another cylinder. If it is still there then swap a wire. If it's still misfiring then more than likely the injector.
Before you spend the money on plugs and wires just swap the plug from another cylinder. If it is still there then swap a wire. If it's still misfiring then more than likely the injector.
Melting Slicks
Joined: Feb 2018
Posts: 2,156
Likes: 1,031
From: North Texas
Had just about the same issue on a 2006 GT Mustang 4.6L.
My scanner indicated a misfire on #2 cylinder.
Just replace 1 plug (#2 cylinder) and all was well.
My advice would be just change that one plug and go from there. It's cheap.
My scanner indicated a misfire on #2 cylinder.
Just replace 1 plug (#2 cylinder) and all was well.
My advice would be just change that one plug and go from there. It's cheap.
Administrator
Joined: Mar 2001
Posts: 368,065
Likes: 24,731
From: In a parallel universe. Currently own 2014 Stingray Coupe.
C7 of the Year - Modified Finalist 2021
MO Events Coordinator
St. Jude Co-Organizer
St. Jude Donor '03 thru '25
NCM Sinkhole Donor
CI 5, 8 & 11 Veteran
Moving this over to C7 Tech for more discussion.