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Old 03-23-2018, 09:42 AM   #4
jwilliams81
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Join Date: Sep 2016
Location: Cincinnati OH
Posts: 290
Default Re: Chasing the knock.

Backfiring could be a stuck valve. That's what mine was.
https://photos.app.goo.gl/iClD1SDIi2GlozyZ2

Fixed it:
https://photos.app.goo.gl/DfOHWJclaOtRwhMv2
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