Focus Fanatics - View Single Post - popcorn sound on deacceleration
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Old 01-23-2013, 11:39 AM   #6
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Join Date: Oct 2011
Fan#: 90409
Location: Wichita, KS
What I Drive: 2011 Sterling Grey SES Sedan

Posts: 3,665
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Its exhaust over-run.

When unspent fuel hits the hot exhaust manifold it pops.
2011 SES 5spd #006 >> SR #213

What other people think of me is none of my business.
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