And while you are at it, may I suggest unplugging the black connector at the starter and "squeezin" the metal female spade inside the connector so that it fits as snuggly as possible when it goes on. A small flat blade screwdriver works fairly well if you use to pry the opening to a smaller configuration. Another feller on here recently had roughly the same problem and after spending his way to fame and fortune, it turned out to be the connector making intermittent contact.

Richard S.
88 Toy 4x4 Truck, 22RE, 3"BL, 5-Speed, Muds
Proud to be an American. Blessed to be a Texan!