I picked the truck up this afternoon before I saw this but I did so at 'quitting time' so there's not really any place for me to run it wide open at the moment as the streets and freeways are congested a bit. I'll take it for a spin later this evening, let it get to temp and run it hard a few times to make sure it behaves appropriately. If not, I'll be calling the dealership and taking it straight back to the shop. Really, really hoping the latter doesn't have to happen though.I think this is all possible and the misfire condition itself can make it worse. The tune was almost certainly over boosting the turbos. The stock turbos have little room for spinning faster, without losing a bunch of efficiency and increasing amounts of heat. If the gap wasn’t correct in the first place, that could certainly have led to premature failure.
Spark plugs lead a hard life. There’s a lot of cylinder pressure and they’re passing a super high volt spark that’s required to work 100% of the time under challenging conditions. I don’t think this was simple overtorquing of the plug or ham ****** install, I’d suspect a combination of inarticulate plug gap, higher than stock boost and heat as a side effect, possibly wrong heat range for the application - I’ll defer to the tuners here, all stressing the plugs significantly more than stock.
Give it a good test drive when you pick it up. get the truck up to operating temp first- Engine AND transmission, then give it some WFO throttle. Make sure you’re symptom free before taking it home as “fixed”. once you do, make sure the truck is stable before modding.
Appreciate you all sticking with me through this and hope you all have a wonderful weekend!