93 Ranger - sputters when accelerating

I have a 1993 Ranger, 170k miles on it. It was running fine, but I wanted to do some preventive maintenance. Had a mechanic replace the spark plugs, plug wires, air filter and fuel filter. After that, it began sputtering when I accelerated. It sputters for a few seconds, and then catches and begins to accelerate. Does it while driving or at a stop. Never had the prob before the parts were replaced. How can I determine the prob?