Ok tested ficm it checks out good here are all my symptoms when the engine is cold it feels like you are riding the brakes until it shifts into 2nd then hauls ass idles rough when the engine gets hot the injectors are very noisy and erratic sounding very little black smoke engine shakes between 1400 to 1600 rpms if you are just holding it there to maintain speed have changed oil to rotella added rev x and it did improve a great deal installed high idle mod very helpful