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Discussion Starter · #1 ·
Some of you may be familiar with the TSB for cold start misfire CEL. The TSB calls for Fiesta spark plugs, gapped at .040, and some software update that as I understand it slightly retards timing. It worked well for me, the CEL went away and never came back.

But now that I'm ready for new plugs - do I go with what this weird setup, or the official spec? I dont think the manual to would call for .028 if it was an issue.

Anybody else had this TSB done and what gap are you running?
 

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2017 Kona Blue ST1
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.040" might as well be a mile. Read the sticky above and adjust accordingly.

J
 
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