1998 Chrysler Concorde Intermittent jerking during deceleration

During car start up the car seems to idle rough but still idling just below 1000RPM, during acceleration there is sometimes a delay in responsiveness, but once the car has taken off and I am accelerating it seems to react normally, however during deceleration there is some fairly violent jerking. This is an intermittent problem and won't happen for weeks at a time and then it will occur again. Error code reads P1297. I recently replaced the MAP sensor, Camshaft Sensor and Crankshaft sensor to try to fix this problem, I replaced them about three weeks ago and had the problem reoccur so I'm back to the drawing board.