I have a 87 yj with the 4.2 engine. I have a no start problem (no spark) that I have narrowed down to the ignition stator in the distributer. I have a replacement unit, but my question is , how do you remove the sensor under the rotor? Is there a special puller to get it off the shaft? Is there another way to pull it ? I hate to by special tools that I will only use once! Thanks for the help.