Discussion Starter · #1 ·
Hello, I'm new to diesel trucks so bear with me please. I bought an 04 2500 turbo diesel with 139k miles, to pull my toy hauler with. The thing was getting about 23 mpg without load in Dec and was getting about 10-11 mpg with the trailer. It always emitted a bit of black smoke on acceleration from stop but not much after that. Now it really smokes black and does so most of the time. At times on cruising on hwy the smoke is grayish black, darkening up with acceleration. I have also noticed that he mileage while towing is down around 8 mpg and sometimes less. I hear no new noises, just the typical high pitched whistle of the diesel engine while driving. There is no boost gauge on the turbo and I am ordering one to install on it. What could be the problem with this truck? Did I get taken by he guy who sold it to me? I expected a little smoke butI have talked to other people with this same truck who say that they get much better mpg towing (around 15 with same weight trailor) and little or no smoke, and around 25 mpg highway without load. Any thoughts?