The special see-through spark plug actually lets you see inside the combustion chamber to see what's going on. You'll instantly see the effect of turning screws. (It is also interesting to watch a car misfire!) Includes reference charts, tune-up tips.
The special see-through spark plug actually lets you see inside the combustion chamber to see what's going on. You'll instantly see the effect of turning screws. (It is also interesting to watch a car misfire!) Includes reference charts, tune-up tips.
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