Possible VX problem..

[GasSavers_NickF829]

so I bought a 92 VX hatchback yesterday, on the test drive i felt nothing strange. once I purchased the car, i drove it 45 miles home, the last 25 miles of interstate i noticed that while maintaining speeds on roads and highway(35, 40, 45, 55, 65, 70mph) the car would feel as if it lost power for a second then the power would kick back in. this isnt while accelerating, this is foot in the same position on gas pedal, and suddenly lose power for a second, then catches again and i resume my cruising, usually in that second of power loss, the RPMs would stay the same, and the car would gradually slow, as if just drifting. anybody have any clues to this? the car is supposedly only getting low to mid 40mpg's, so im thinking this may have something to do with it.

any help would be greatly appreciated!

Nick