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Old August 19th, 2010, 16:51   #13
Veteran Member
Join Date: Dec 2001
Location: Williamstown, Mass

Yep, that's the auxiliary furl pump. It's pump #2 in the system.

Pump #1 is the Lift Lump in the tank that supplies fuel at low pressure to the fuel filter and from there to the Aux Pump. The Aux Pump then sends fuel to the HPSP at 70psi. The HPFP supplies up to ~26,000psi to the rail.
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