Joined last week and have been reading all the tech info I can within the forums. I just bought a nice 2000 F-350 4x4 7.3l w/111,000 mi from a retired horse vet who used it as his personal truck. A super chip tuner/programmer came with it and was set on "perf tow", which is a setting for towing less than 6000 lbs. I reprogrammed it to the "high perf" settting for now until I'm ready to pull our fifth wheel camper. Thinking the horse doctor babied the truck, I took it out for a hard run after I reset the program and it smoked some, but not what I would say excessively. Reading some of the comments by other members it seems that heavy smoke is a good thing. This is my first diesel and I love the power it puts out, but I'm confused as to what heavy smoke really represents. Any guidance is appreciated.
