I have a 2014 Nissan Pathfinder SL 3.5L V6. When my wife bought this in September 2025, it seemed fine at the time, no transmission or engine issues. She drove it home for 2.5 hours, then around town for a few days. I was out of town at this time, and she drove to pick me up, 3 hours each way. It drove fine during all that. Anyhow, shortly thereafter, it started to seem like it was kind of jerking at lower speeds, had a rough idle, almost where it might die. I replaced the front 3 spark plugs, a
