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· 1966-2013
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13,740 Posts
Well, you'll (almost) never burn up a piston or valve with a rich engine.

That aside, 2 & 3 certainly do look more than a bit fat.

Are they gapped properly?
Is the valve lash set correctly, or at least equally across all 4 cylinders?

And, just at a reach, do you happen to have the vac lines on #1 and #4 for brake and crank ventilation? (this would explain why those two are leaner than the others as thre airflow is slightly different)

The closeup of #3 shows something goofy going on at the electrode, or is that a bunny turd that got stuck there? (might just need new plugs :shrug: )
 
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