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Old 12-29-2012, 05:08 PM
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Yup a blown power valve will do that ( from a previous engine backfire)
happens sometimes.

On a blower motor that does not have enough idle timing the chance of a backfire is greatly increased.
It don;t get any better as the plugs foul, either.

Old stale gas is a pain. Ethanol or not. Lots of people try to blame everything including bad luck bad weather and more
on ethanol. Most of that is BS.
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