Is trouble code po351 in a jeep a bad ignition coil?

since it is a 1997 i would just for gp replace the coil and the crank case positioning sensor.and depending on what else has not been replaced since you bought it i would change the wires and plugs too. save you some headaches in the future. and hopefully that is all you will need to do to fix the problems in your ignition. good luck. a position sensor cost me$75 and the coil cost me $40 just for comparision