I just had my 6.9 fuel distributor and warm up regulator rebuilt and reinstalled along with new injectors. I originally had a hot start problem. Wow, what a difference that made. Engine runs and starts very nicely. The only thing I notice is a small hesitation from idle when accelerating, then it takes off. My mechanics (old guys with German accents) said it's a very common issue. I'm happy to live with it.