I have a 2000 Southwind on the F53 platform with a V10, when I tried to start it today the engine turned over but would not stay idling, I tried a couple times and it did the samething. This happened ...
Start with the most simple thing. Get a bottle of Marvel Mystery Oil, and dump the suggested amount into our gas tank. It will clean your injectors, fuel system, upper cylinders, valves, etc. Often it works on those pesky little fuel start issues. Do it for a few tanks of gas and see if it fixes the problem.
If you notice a smoother running engine when you use it, you know there was fuel delivery issues.