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Should I change all spark plugs or just the bad ones?

  

0
Topic starter

Do you have to replace all spark plugs (depending on how many plugs there are) even if one or two of them went out?


4 Answers
6

I would, for the sake of even combustion across all cylinders and because if one or two are bad the others will probably not be far behind.


4

I always change them all out together.


4

They’re so cheap for most cars these days, why would you want to guess (with the other plugs) when diagnosing a problem?


1

Change all and move on! If ones bad others can possibly start acting up. Again it all about age and mileage


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