Simple and Easy to Use:
Turn the unit on & select "real time-engine running" or "snapshot-no start" mode
Instantly detect if their is voltage (red LED) present and if the spark plug (green LED) is firing while under compression
Simply place the probe at the end of the spark plug boot without having to remove any wires or plugs
"The OK Spark spark plug tester is the hottest diagnostic tool on the market today," Winner of the PTEN 2009 Diagnostic tool award, "it's fast, easy to use...Defintely a must have in your toolbox" says Master Mechanic Sam Memmolo
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