Lisle ignition tester

[Jack Klarich]

This can help diagnose a no spark condition easy and fast and it's less than $10.

Lisle 19380 Spark Indicator

 

[NEWHD74FAN]

A very handy tool...O'Reilly's/Kragen, NAPA carries them, and beats unplugging wires, which can do much more damage, as more wires these days have carbon impregnated fiberglass conductors wrapped with fine monofillament to give it some "pull strength". But reality being what it is, they can only handle a few unpluggings over their life (heat and corrosion) in the connections will do the rest, notwithstanding.