Tried a smaller gap & it makes it 3 times worse. I only have a diagnostic style FP gauge to use i can't see it while driving. Spout is in.
BTW i just pulled 2 plugs both were slightly frosted white which indicates a lean condition. I disconnected the FP vac hose to
bring up FP momentarily & it seemed to help.
But it still doesn't explain the rich exhaus odor.
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