4lo, CEL,traction, misfire cylinder 7, engine stumbling random

[David Rodgers]

Pretty much. Incorrect mechanics guesses. Hard to diagnose, seemingly random issue. I don’t know if I’m going to do anything about it since they did put in new head gaskets, machined heads, valves (seats and oil seals, valley gaskets. Valve gaskets, spark plugs, etc…EGR). Still deciding.

 

[Acrad]

Only official TSBs for EGR are 14-17 but I have seen other model years have issues albeit rare overall for all model years

https://static.nhtsa.gov/odi/tsbs/2017/MC-10131859-9999.pdf

 

[Rednexus]

Pretty much. Incorrect mechanics guesses. Hard to diagnose, seemingly random issue. I don’t know if I’m going to do anything about it since they did put in new head gaskets, machined heads, valves (seats and oil seals, valley gaskets. Valve gaskets, spark plugs, etc…EGR). Still deciding.

If you paid close to $10K for that work, it may be worth going back to the installer and seeing what they are willing to do as it was their recommendation for you do to do the work, and their recommendation was wrong. And, if they are not willing to play ball, often times you can have a lawyer write a demand letter for a few hundred dollars. It's not a tiny sum of money, so if you are able to recover at least some of it, it may be worthwhile.

Who knows, maybe they'd be at least willing to refund the labor. I'd consider that a success.