The fuel lines were replaced through the warramty repair? I'm not sure if that could be a factor. I use premium gas at whichever station I'm at. I used to be a shell only, but there is no shell in feasible distance near me in my current location. My wiring was also replaced. **The mention of the rotten egg smell is that maybe it may have something to do with everything going on. Sent from my SM-G955U using Tapatalk