Ok, I will explain turbo farts. Ive heard this term used when a turbo is sticking and the truck essentially "farts" because of the sticky turbo. Yes, I have black smoke when it farts (when it decides). It does not matter what speed. It seems like when you try to accelerate the truck like trying to merge into traffic or getting out onto the main road, its like the turbo just decides to crap out or is slow to spool. It does not "fart", but simply does not spool. Then its like "Oh, ok" then either slowly spools or takes off like a bat out of hell. There have also been times when it has not done anything at all and I am basically driving a non-turbo. Only time it has farted here lately has been getting in on the truck kinda hard or in a climb and basically no turbo. I also have a Magnaflow and when it decides to crap out, you cannot hear the Magnaflow. As long as the Magnaflow sings, it has plenty power and normally turbo is working. Bad thing is, I have no boost gauge (yet) so I have no clue what the boost pressure is. Im not sure if the injectors have ever been done, but I certainly do not look forward to that. I read the the EBP sensor was basically the brain for the turbo, so took it off and cleaned the sensor itself. That made no difference, but may try the new sensor.