VVT-i engines. Fuel is circulated from the fuel tank to the fuel injection system, and back to the fuel tank, through a pair of metal pipes running along the

Non-VVT-i engines

Fuel pump and pipes

Fuel is circulated from the fuel tank to the fuel injection system, and back to the fuel tank, through a pair of metal pipes running along the

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underside of the vehicle. An electric fuel pump is attached to the fuel level sender unit inside the fuel tank. A return system routes hot fuel back to the fuel tank through a separate return line, whilst fuel vapour is routed into a carbon canister where it is stored, until it's then fed back into the intake manifold and burnt during the normal combustion process.

On these engines, the fuel sender/pump unit incorporates a pressure regulator. Fuel is pumped along a single pipe to the front of the vehicle - any excess pressure created by the pump is released directly back into the tank via the regulator.

Fuel vapour is routed into a carbon canister where it is stored, until it's then fed back into the intake manifold and burnt during the normal combustion process.