Toyota 1 MZ–FE Manual page 220

EG2–220
OPERATION
FUEL SYSTEM
Fuel is pumped up by the fuel pump, which flows through the fuel filter under pressure through
the fuel pipe to the delivery pipe where it is distributed to each injector.
The fuel pressure regulator adjusts the pressure of the fuel from the fuel line (high pressure side)
to a pressure 284 kPa (2.9 kgf/cm
and excess fuel is returned to the fuel tank through the return tube.
When the engine is hot, the fuel pressure is increased to control percolation in the fuel system
and improve restartability and idling stability.
The pulsation damper absorbs the slight fluctuations in fuel pressure caused by the injector.
Fuel is injected into the intake manifold according to signals from the ECM.
1MZ–FE ENGINE – SFI SYSTEM
2
, 41 psi) higher than the pressure inside the intake manifold,