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How to check if a spark plug fires (car engine)

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How to check if a spark plug fires (car engine)

118,967 views November 8, 2013 3:20

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Channelfurulevi

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Spark Plug troubleshooting test:

Pull wires (one at a time) from the spark plug while engine is running:
- If motor idle speed drops for each wire pulled, then the spark plug is firing correctly in the cylinder;
- If motor idle speed does not drop for a pulled spark plug wire, then the spark plug is not igniting the fuel in the cylinder.

About this tutorial

furulevi published this 3:20 video tutorial on November 8, 2013. It has been watched 118,967 times on YouTube.

Channel
furulevi
Duration
3:20
Published
November 8, 2013
Views
118,967
Likes
184

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