Touch of history. Requested by BigJoe
I bought my 99 SD 4 door shortbox new. I have towed with it all it's life. 7-10K pounds. It has 243K miles. I am not a mechanic what so ever. I have added a 4 inch exhaust, AFE intake, Superchip which is always on TowSafe, exhaust and boost gauges, air lift, leveling kit, and a few other things. Lately I had to drop a used reman engine into it. It runs poorly when it's cold and doesn't seem to run as well as it should. One friend suggested to have the tranny serviced. That did nothing. Another friend suggested that some gate on my turbo isn't functioning properly. When it decides to go, it goes. When it decides to be a dog, I'm stuck going 15 MPH. It has a mind of it's own. A mechanic has said that the diagnostic computer checks out good. E-