Whenever I take a road trip and keep my speed steady for an extended
period of time the engine will begin to cut out. Letting up on the
accelerator will temporarily allow the engine to become responsive again.
It is not until I pull off the roadway and turn off the engine for a
period of time that the condition is again temporarily stopped.

     Of course once I get back home and drive around town the problem
does not exist and consequently becomes a low priority.

     In order to stop this annoying cycle can anyone give me a clue as to
what is causing this to happen so as I can get it fixed before my next
road trip?
Thanks, Pat.