Jet Pumps; Filler Neck And Check Valve - Aston Martin V8 Vantage Workshop Manual

Fuel Tank and Lines (10.01)
Fuel (10.00)

Jet Pumps

Fuel feed from the fuel pumps is split three ways:
1. Feed to the fuel rails.
2. Feed to the swirl pot jet pump (integral to the FDM).
3. Feed to the externally mounted jet pump (LHS).
These pumps ensure that the appropriate pump swirl
pot is maintained with fuel under severe dynamic
conditions.
10-1-4

Filler Neck and Check Valve

Incoming fuel passes through a check valve at the base of the
filler neck. This valve is normally held closed by light spring
pressure. The valve opens under the pressure of incoming
fuel and closes again when fuel flow ceases. The check valve
prevents surging of fuel in the filler neck.
The filler neck also forms part of the on-board refuelling
vapour recovery system. Incoming fuel forms a liquid seal in
the filler neck. Thus any air displaced during fuel tank filling
cannot escape via the filler neck.
Workshop Manual October 2005