Description - Toyota 1PZ Repair Manual

FU-2

DESCRIPTION

FUEL SYSTEM
Fuel is drawn up from the fuel tank through the fuel filter (sedimenter) by the feed pump built into the
injection pump. The fuel drawn up is then sent into the pump housing. Fuel compressed in the pump housing
is distributed to the injection nozzles according to the injection order, and injected at high pressure into the
combustion chamber. Excess fuel in the pump housing flows through the overflow valve and along the
overflow pipe and returns to the fuel tank. The fuel cycle provides both cooling and lubrication for the pump.
The cycling of fuel through the pump chamber warms the fuel so that it is prevented from becoming wax-like
at cold temperatures.
FUEL SYSTEM Description