my IV-P always stops when switching tanks any time I
am pressurized. My fuel pump is in the recommended
area inside the cabin so I suspect some minor leak in
the system that keeps some negative pressure,
eventually learned to switch to high boost pump prior
to switching and that cures the problem but the engine
runs rough for a few seconds. will try the trick on
the ground and see if that cures the problem. we event
replaced the fuel pump and that did not cure the
problem,.
andres