How do you check spark plugs without removing them?

Spark plugs are an important part of your engine and need to be in good condition for your car to run well. However, checking them can be a pain – you have to remove them from the engine and then check the electrodes. But there’s a way to check them without removing them!

Just take a look at the plug wires. The ones that go to the spark plugs should be slightly darker than the others. If they’re all about the same color, it means that one or more of your spark plugs isn’t working properly. You’ll need to replace those plugs as soon as possible!

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