Technician a says to use a normal spark plug when checking for spark. technician b says that a spark tester should be used to check for spark. which technician is correct?

A spark plug tester is a handy tool that allows you to check if your spark plug is working properly. It can also save you time by allowing you to check if the problem is actually in your ignition. Follow these guidelines for an easy way to use a Spark Plug Tester.

Checking for Spark Plug Misfire

Spark plug misfire, or spark miss, is when the sparks jumping the gap of the electrodes are inconsistent in their timing. This can cause your engine to stumble, lose power, and even emit black smoke (due to unburned fuel not being ignited in the combustion chamber). The following steps can be taken to check if you are experiencing spark plug misfire.

Disconnect the spark plug lead from the spark plug.
Connect your spark plug tester to the spark plug lead.
Connect the spark plug tester to the spark plug creating a link from the lead to the spark plug.
Start the engine and watch the gap in the spark plug tester to see if there is inconsistent timing.

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