We have a Blue Bird WanderLodge with above engine. After driving the bus either on the highway or Interstare for 30 minutes or so, the engine will die when either slowing down for construction, heavy traffic or after you have exited on to the feeder road. The bus will crank right back up after stalling out. It will also do this when driving at very low speeds such as in an RV park, usually after driving for at least an hour. Anyone have an idea where to start with this engine?