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Join Date: Mar 2000
Location: Lacey, WA. USA
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Quote:
Originally Posted by dtxscott View Post
Simply unplug each spark plug one at a time with the engine running. If the idle stumbles or changes, that cylinder is functioning

If the idle is unchanged when pulling the plug wire, that cylinder is no bueno.
I strongly recommend against this. Experiencing 30,000 volts is an interesting experience. It teaches you to never touch the ignition system of a running engine.

The timing light method is a good one. As is the infrared thermometer method. Every tool box should have both these tools.
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Old 06-19-2023, 05:16 PM
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