You’re A Mechanic If You Can Pass This Essential Car Maintenance Quiz

When do you need to adjust the gap of an EFI car’s spark plugs?

Retry Correct Incorrect Spark plugs, once gapped, do not need gapping again. Just when you get new ones, you need to make sure the gap is same as the requirement of your engine.

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Hannes P. Albert/picture alliance via Getty Images

Hannes P. Albert/picture alliance via Getty Images

When do you need to adjust the gap of an EFI car’s spark plugs?

• When getting new spark plugs
• At every oil change
• Every 50,000 miles
• Never