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International Automotive Technicians Network
Re: P.S. air, and out of ideas
Posted to Technical Discussion Forum on 5/25/2023

Try to apply air pressure on top of the reservoir. I agree that it sounds like the return side is allowing air into the system. Pressurizing the system even slightly may reveal the source of the air ingestion. Or, it could be a restriction. It doesn't have to ... Login to read more.