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Old 05-20-2018, 07:52 AM
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400 Lemans 400 Lemans is offline
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Join Date: Dec 2007
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Could be a broken spring under the plunger of the fuel pump. They will still pump but there is nothing there to take up the slack in the plunger arm. I have had this happen before and it was the last thing i thought to check and there it was. Sounded like a valve tapping. Cant tell from the videos though if your running a mechanical fuel pump.