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Service Writing Tip: Justify Your Recommendations
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Description
In the days of carbureted engines, mechanics would always take a moment to examine the spark plugs they were replacing as part of a routine tune-up. The plugs often provided valuable information as to how well the engine was performing and whether there were any serious issues to investigate.
Today, with electronic control units managing the engine’s operation, reading spark plugs doesn’t seem as important as it once was. Spark plugs, after all, are not replaced at the same intervals as they were way back when. But that doesn’t mean that the stories they tell should be ignored.
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