C7 misfire
Thread Starter
2nd Gear
Joined: Oct 2021
Posts: 2
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C7 misfire
C7 stingray has a misfire problem….. Car shutters when I hit the gas, like it has a bad plug or something…. I’ve changed the spark plugs and wires. I thought it was the transmission, had it flushed by the dealership….I even changed a couple of coil packs…. It does it when I mash the gas,but not alll the time.Seems like it does it when switching in an out of v4 mode, it hard to explain ..any help thanks
Edit
Le Mans Master
Joined: Aug 2001
Posts: 6,071
Likes: 297
From: Savannah GA
Cruise-In IV Veteran
C7 stingray has a misfire problem….. Car shutters when I hit the gas, like it has a bad plug or something…. I’ve changed the spark plugs and wires. I thought it was the transmission, had it flushed by the dealership….I even changed a couple of coil packs…. It does it when I mash the gas,but not alll the time.Seems like it does it when switching in an out of v4 mode, it hard to explain ..any help thanks
Edit
You need to pull the codes. Could give you more insight. I've had cracked spark plug insulators cause misfire, as well as bad injectors. Pull codes may tell you which cylinder or provide other areas to look.
Team Owner
Joined: Jan 2007
Posts: 29,063
Likes: 1,839
From: cookeville tennessee
ttt
I agree other than taking it to a shop that can put her on a machine to tell you what hole is not working good. Robert
Pro
Joined: Mar 2002
Posts: 732
Likes: 138
From: Allen (DFW) Texas
Based on your description that the misfire seems to occur when switching AFM modes, you may want to have the car checked for the issue noted in the attached GM sevice bulletin. Symptoms sure sound like the AFM issue noted in the bulletin.
