Intermittently Missong on One Cylinder

[Vandal]

Noticed my engine will sound like it is missing one one, then get better, then do it again. Is this a known problem with stock coil packs or can trigger?

 

[Juice]

Start with a scan for codes. Could be a lot of.things.

 

[Vandal]

Nothing in the codes. Could low octane cause a similar sound at and just off of idle?

 

[Vandal]

Swapped a stock muffler on. No more odd noises or missing.

 

[skwerl]

Could be a loose connection on a COP somewhere. Make sure all wire connections are fully seated.

 

[Vandal]

I’ll double check them.