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Spark plugs change or other issue

BlakeS94 · 2021-02-06 16:33:08

Did a once over on my partners car and when I inspected the spark plugs the threads were black with carbon, not excessive or thick but it covered the entire threaded surface with a thin layer, also the ground electrode has corroded a bit on each plug. Would changing the plugs be a good option or can they be left alone? Is…

06-02-2021 04:33PM

#1

BlakeS94

Registered Users, Registered Users 2 Posts: 1,333 ✭✭✭

Join Date: November 2020

Posts: 1239

Did a once over on my partners car and when I inspected the spark plugs the threads were black with carbon, not excessive or thick but it covered the entire threaded surface with a thin layer, also the ground electrode has corroded a bit on each plug. Would changing the plugs be a good option or can they be left alone? Is there another possible issue causing the black deposits on the threads? The car has 61k miles and I presume they are the original NGK iridium plugs by the part number being OEM.

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