Anyone have problems with the coils?
Thread Starter
Tech Contributor
Joined: Jan 2015
Posts: 5,692
Likes: 1,451
Anyone have problems with the coils?
I am misfiring again after a track day. Last time it was cylinder 2 coil. Assuming it's going to be the same problem but I haven't got an engine code stating a specific cylinder yet. Anyone else have problems with the stock coils ?
Melting Slicks
Joined: Feb 2009
Posts: 2,797
Likes: 608
From: Dallas Georgia
2020 Corvette of the Year Finalist (track prepared)
C3 of Year Winner (track prepared) 2019
Are you positive it is the coil? I have had issues with a variety of wires, from stock to Accel ceramic boot wires. If you have HP Tuners, datalog the misfire and swap plug wires. Mine only did it hot in an on track condition but when it did it, it became very noticeable. Swapping wires caused the misfire to change cylinders, so it was an easy fix.
Last edited by fleming23; Sep 19, 2018 at 08:56 AM.
Thread Starter
Tech Contributor
Joined: Jan 2015
Posts: 5,692
Likes: 1,451
Are you positive it is the coil? I have had issues with a variety of wires, from stock to Accel ceramic boot wires. If you have HP Tuners, datalog the misfire and swap plug wires. Mine only did it hot in an on track condition but when it did it, it became very noticeable. Swapping wires caused the misfire to change cylinders, so it was an easy fix.
what kind of wires did you go with?
Last edited by BrunoTheMellow; Sep 19, 2018 at 10:10 AM.
Melting Slicks
Joined: Feb 2009
Posts: 2,797
Likes: 608
From: Dallas Georgia
2020 Corvette of the Year Finalist (track prepared)
C3 of Year Winner (track prepared) 2019
interesting. Well when I first had this I replaced the coil and the issue went away. I was misfiring at normal engine temp in 3rd gear pulls, 4k to 6k rpm. Every time. Let me double check but I'm 90% sure I changed the wire first on that cylinder and didn't work.
what kind of wires did you go with?
what kind of wires did you go with?
Thread Starter
Tech Contributor
Joined: Jan 2015
Posts: 5,692
Likes: 1,451
I ordered a set of stock wires and a set of lava insulating covers. Interesting that even stock headers are killing them.
Last edited by BrunoTheMellow; Sep 19, 2018 at 12:37 PM.
Melting Slicks
Joined: Feb 2009
Posts: 2,797
Likes: 608
From: Dallas Georgia
2020 Corvette of the Year Finalist (track prepared)
C3 of Year Winner (track prepared) 2019
okay I was incorrect. I replaced both coil and wire at the same time. Hmmm I believe I did that because I was short on time for my next event.
I ordered a set of stock wires and a set of lava insulating covers. Interesting that even stock headers are killing them.
I ordered a set of stock wires and a set of lava insulating covers. Interesting that even stock headers are killing them.
Safety Car
Joined: Feb 2002
Posts: 3,726
Likes: 368
From: Montoursville Pa
If you experience the issue again, please update this thread. It has happened to me twice now, with two different sets of plug wires, both sets with those woven heat jackets. I assumed it was just a fluke on my car, or maybe I tugged on the wire too hard when removing, etc.
Race Director
Joined: Mar 2001
Posts: 19,975
Likes: 6,778
From: Bonneville Salt Flats
Any time I've had coil problems on anything, even one of the B'ville racers, it was a name-brand aftermarket coil, never an OEM. In fact, I gave up on a very high-performance street car and ended all my ongoing, intermittent ignition problems when I pitched the high-dollar, hipo coil and installed a stock one from a local dealership. Can, you get a wonky stock coil... sure just like anything else, but if you are having repeats on the same cylinder I'd be suspicious. Best of luck with it, in any event. 
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Thread Starter
Tech Contributor
Joined: Jan 2015
Posts: 5,692
Likes: 1,451
If you experience the issue again, please update this thread. It has happened to me twice now, with two different sets of plug wires, both sets with those woven heat jackets. I assumed it was just a fluke on my car, or maybe I tugged on the wire too hard when removing, etc.