FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
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Home >> Mercury >> 1993 >> Grand Marquis V8-281 4.6L SOHC >> Repair and Diagnosis >> Powertrain Management >> Ignition System >> Testing and Inspection >> Pinpoint Tests >> Pinpoint Tests >> F - Misfire Under Load (Bad Plugs, Wires, or Short to Ground) >> Test Step 2

Test Step 2








Average value of spark plug firing voltage: 15KV or less with evenness of spark plug firing voltage: 5 KV or less.

These are normal values for a properly operating ignition system.
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