Misfire after header install
Melting Slicks
Joined: Oct 2009
Posts: 2,560
Likes: 485
From: Moberly, Mo
I would really start with a set of aftermarket wires. I run the 12" extra length Speed Engineering as they give you a little extra to be able to move the wire around a little to make sure they don't touch the header tubes. Sometimes its very hard to get the wire end on the plug properly, it takes a little moving it around to make sure it actually clicks on the plug end. You can look very easily at the coil connection to see if they all look equal but its hard to see that on the end of the plug. We've probably all had this problem when putting the old plug wires back on or event the new one. Its also possible when you were installing one of the new plugs you may have cracked the one of the plugs with the socket tightening them down. Hope you get it figured out.
Last edited by 99vetteran; Jul 7, 2021 at 08:22 AM.
Instructor
Joined: Jan 2020
Posts: 143
Likes: 12
From: Beaumont, Southeast Texas
I would really start with a set of aftermarket wires. I run the 12" extra length Speed Engineering as they give you a little extra to be able to move the wire around a little to make sure they don't touch the header tubes. Sometimes its very hard to get the wire end on the plug properly, it takes a little moving it around to make sure it actually clicks on the plug end. You can look very easily at the coil connection to see if they all look equal but its hard to see that on the end of the plug. We've probably all had this problem when putting the old plug wires back on or event the new one. Its also possible when you were installing one of the new plugs you may have cracked the one of the plugs with the socket tightening them down. Hope you get it figured out.
Melting Slicks
Joined: Oct 2009
Posts: 2,560
Likes: 485
From: Moberly, Mo
Melting Slicks
Joined: Oct 2009
Posts: 2,560
Likes: 485
From: Moberly, Mo
Last edited by 99vetteran; Jul 7, 2021 at 03:20 PM.
Pro
Joined: Mar 2014
Posts: 533
Likes: 271
From: Indianapolis, IN
I changed from the stock plug wires to MSD and as noted above there was a world of difference.
I couldn't believe after 25K miles (over 4 years old) the OEM wires were so brittle..
It was easy to do, except the back plug on the passenger side. I reused the shield spring deal.
Based on my experience, I would change plug wires and plugs.
Ken
I couldn't believe after 25K miles (over 4 years old) the OEM wires were so brittle..
It was easy to do, except the back plug on the passenger side. I reused the shield spring deal.
Based on my experience, I would change plug wires and plugs.
Ken
Melting Slicks
Joined: Oct 2009
Posts: 2,560
Likes: 485
From: Moberly, Mo
I changed from the stock plug wires to MSD and as noted above there was a world of difference.
I couldn't believe after 25K miles (over 4 years old) the OEM wires were so brittle..
It was easy to do, except the back plug on the passenger side. I reused the shield spring deal.
Based on my experience, I would change plug wires and plugs.
Ken
I couldn't believe after 25K miles (over 4 years old) the OEM wires were so brittle..
It was easy to do, except the back plug on the passenger side. I reused the shield spring deal.
Based on my experience, I would change plug wires and plugs.
Ken
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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