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ovalking · 22-03-17, 11:04 PM

The buzzing fuel pump seems a bit odd. Mine makes more of a whine, and you can't hear it when engine running.
I wonder if it is under excessive load for some reason. Have you done a fuel delivery test? I don't recall the litres/min figures but it's a lot.
Maybe it's the power to the pump that's the problem. Any buzzing when the fuel pump relay is bypassed? (Position 10 in the fuse box).

22-03-17, 11:04 PM	#5
ovalking Grown up member Classic Audi Club Member Join Date: May 2009 Location: Ipswich Posts: 272	The buzzing fuel pump seems a bit odd. Mine makes more of a whine, and you can't hear it when engine running. I wonder if it is under excessive load for some reason. Have you done a fuel delivery test? I don't recall the litres/min figures but it's a lot. Maybe it's the power to the pump that's the problem. Any buzzing when the fuel pump relay is bypassed? (Position 10 in the fuse box).