Thread: Noisy Fuel Pump
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Roger 04 RT Roger 04 RT is offline
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Join Date: Oct 2015
Location: Naples, FL and Cape Cod
Posts: 143
The AFXIED setting isn’t causing any change in sound from your fuel pump. If the return QD (or the high pressure line) isn’t seated properly you get a change in sound level because the pump pressure increases dramatically.

There’s also a vibration damper at the rear of the pump. If that rots out, the noise level goes up too
Old 01-29-2018, 05:29 AM
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