cs,
@cs@mastodon.sdf.org avatar

I pulled these early, with about 70,000 miles on them as the car runs a little rough during idle. Note the discoloration on plug 1, rt in both images. Electrodes look good on all of them. Note darkness on seat not seen on others. Also note discoloration on ceramic insulator on 1 and 2, not seen on other plugs. Comments welcome.

New plug on left. Used number one plug on right. Note discoloration of blackened threads, washer, and neck. The ceramic also has orange discoloration.

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