When warm, there is a rough idle and rough acceleration but engine runs smooth when at steady engine speed. Dealer replaced air-flow meter twice, but that is very short term fix until problem resumes. Carb cleaner or injector system cleaner results in only a couple days relief. Car will buck like a bronco when it accelerates, engine-check lite mostly stays off.

UPDATE: Dealer finally discovered problem was arcing wires. Replaced wires and installed new plugs to finally fix the problem.