When a spark plug becomes fouled or dirty, it doesn’t spark effectively which can cause your car to perform sluggishly.

Will a fouled plug still spark?

When a spark plug becomes fouled or dirty, it doesn’t spark effectively which can cause your car to perform sluggishly.

Will a fouled spark plug clean itself?

Spark plugs are made to be self-cleaning. … If this is the case, laying into the throttle and taking your car for a quick 20-minute trip on the motorway will do the trick in cleaning your fouled spark plugs.