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Old 02-14-2021, 04:19 PM   #41
City: gulf coast
Join Date: Jun 2014
Posts: 3,441
Since you have no fuel leaks reported when running and pressurized the question becomes where is the air coming from?. The most obvious source is the fuel return. I suspect a bad check valve is allowing fuel to drain out of the IP side of the system back to the tank and drawing air from the tank.
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