The washer stops during cycle and starts back up and complete the wash cycle.sometime I shut it off and start it back and it will continue. and tap on it at time (timer) to start it back washing and it will not shut off spinning at time.
The erratic, intermittent operation and that you tapping the timer restores operation all suggest the timer is faulty. I would recommend replacing the timer. The correct timer for your model is available below.
http://www.appliancepartspros.com/whirlpool-timer-control-60-3954915-ap3082294.html
Thanks!! Bad Timer.