6 Symptoms of Bad Spark Plugs | Signs Your Spark Plug is Bad

In this Video we'll look into 6 most common signs of bad spark plugs in your car. Understanding these indicators is important for all car owners because spark plugs play a huge role in the combustion process which affects engine performance and fuel efficiency.
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[@xion637]

It would be good to mention that the brown staining on the white of the spark plug is normal. It is called corona staining and naturally occurs as the high voltage from the coils packs pass through the plug. It doesn't affect the plug's performance.

[@fixit3879]

Yes, that is true. Thank you for mentioning it.

[@UnaKing-we7vp]

Does bad spark plugs knock engine when it cold or when it's hot

[@fixit3879]

It can be both. When it starts misfiring, it can do both. Good Luck!

[@iamredrunt172]

Mechanic? I consider mechanics nuts and bolt type guys. Transmissions engines etc. Not to sound offensive. How's about calling us automotive technicians. We are like doctors of the machine world.😂😂

[@fixit3879]

Sounds good to me. Thank you!