P0308 and P0316. New plugs and coils. Plugged retorqued to 25. Tried my OEM coil in its place, cylinder 8; no change.

Thoughts? Have not pulled plug yet; need to get a new one in hand first. Searching I've seen this could be an injector issue? It goes back to my mechanic that did the initial install on Monday. No idea why they would have taken the fuel rail off but maybe they did and broke something.

I also programmed back to stock tune and did the KAM reset. No luck there either.

 

Fixed. Got a bad plug!

 

That will do it. Same thing happened to me once. You never know how many times they drop those things at the parts store.

Glad it was easy.