1994 Nissan Sentra mileage: 135,000. Car surges/stutters if speed is between 50 mph to 60 mph when feathering the accelerator. Example: Coming down off the Chesapeake Bay Bridge in Md. When not accelerating but not decelerating between 50 mph to 60 mph the car starts surging/stuttering. Have replaced all ignition parts/fuel filter. Car runs smooth otherwise. Thanks
The EGR valve may be cycling opening and closing. Replacing the valve may cure the surging. It is also possible, if your car is equipped with air conditioning, that the air conditioning compressor may be cycling on and off, lugging the motor.