Lotus 2004 ELISE Service Notes page 272

Lotus Service Notes
To Remove Pump/sender Assembly
1. Remove the fuel tank (see sub-section
LK.4).
2. Release the eight nuts securing the
clamping ring, and carefully withdraw the
pump assembly from the tank. Immedi-
ately seal the tank aperture to reduce the
vapour hazard and prevent dirt ingress.
3. For permitted disassembly of the pump
unit, refer to Engine Repair Manual
B0120T0327J.
4. To refit the pump assembly, renew the
rectangular section sealing ring before
carefully feeding the sender float arm
in through the tank aperture. Orientate
the unit with the breather spigot pointing
inboard, and fit the clamping ring with the
location tab engaged with the recess in
the pump top moulding. Fit and secure
the eight M6 washers and nuts.
5. Refit the fuel tank into the car (see sub-
section LK.4).
6. Connect the fuel feed pipe and retain with
the spring clip. Connect the breather pipe
to the spigot on the pump top plate. Fit
the harness plugs to the pump/sender
connector, and to the pressure sensor.
LK.6 - CHARCOAL CANISTER
In order to prevent fuel vapour venting from the fuel tank to atmosphere, the breather pipe from the tank
is routed to a canister filled with activated-charcoal, which absorbs and stores the fuel vapour when the engine
is stopped. When the engine is running, the canister is connected to the depression in the inlet manifold via a
port on the intake plenum such that fresh air is drawn through the canister to purge the charcoal of its absorbed
fuel, with the resultant gas then consumed by the engine in the normal combustion process.
Charcoal Canister
This is mounted at the right hand front corner of the engine bay via a bracket fixed to the bulkhead. Fuel
vapour from within the tank and collected from the FLVV and a spigot on the fuel pump/sender top plate, is
routed to the canister port labelled 'tank'. This port is extended within the canister to the underside of the char-
coal bed, below which is a reservoir to collect any liquid fuel. A second port on the canister ('vent') connects
the top side of the charcoal bed to atmosphere via a solenoid controlled 'close' valve. In this way, vapour from
the fuel tank is cleansed of fuel by the charcoal bed before venting to atmosphere.
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Section LK
Clamp ring
Spacer ring
Pressure sensor
Pump support
Pressure regulator
valve
Filter & gauge
sender unit
Fuel pump
Intake strainer
sock
Cushion
Retaining cap
03/03/2006 11:22:30