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Old 10-27-2020, 07:24 AM   #20
Pilotdave
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Join Date: Oct 2010
Location: Grafton, MA
Posts: 1,226
Default Re: New engine - intermittent backfiring - stuck valve?

Fuel cap suggestions might be correct. A car on a recent tour had similar symptoms. Loosened the cap and the problem went away. Worth a check.
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