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Re: Thumping noise from airbox
Posted to HD/Fleet Forum on 7/5/2014

Hi Martin,

If I suspect a damaged piston/ring resulting in blowby, I use either a firstlook or WPS transducer in the dipstick tube and synching(electrically) off injector #1 all set up on my Pico Scope.

This should show a pressure rise and help with identi... Login to read more.