This is a big one for me. I took my truck in to the shop to get it fixed because it was randomly smoking on the highway. Huge white plumes would come billowing out of my exhaust at random times throughout the day. Sometimes on flat ground even, no turbo spoolup and all my fluids were fine. Coolant and oil level never changed. Shop let it sit out back for an hour regening it even after i told them it was something different.
