Remember the old days when you could check your “Detroit iron” engine for spark by just inserting a spare plug into the wire, laying it on the block where you could see it, and cranking it over?  (Or maybe you conned your younger brother into holding the wire — just once.)  With new coil-on-plug ignitions, those days are gone.

Thankfully, Wakeon’s coil-on-plug quick probe makes the process even simpler — and safer — than before.  Just press the probe’s antenna against the ignition coil and it’ll flash an LED strobe each time the coil fires.  It also flashes a green LED to indicate sufficient arc duration.