The following are the main components of the 1.3L (VIN
2) sequential fuel injection system:
| • | The throttle body assembly |
| • | The fuel pressure regulator |
| • | The fuel feed pipes and hoses |
| • | The fuel return pipes and hoses |
The supply of fuel is stored in the fuel tank. An electric fuel pump
pressurizes the fuel through an in-line fuel filter to a fuel rail assembly
that supports the fuel injectors. The electric fuel pump is located in the
fuel tank. The fuel pump is designed to provide fuel at pressures and volumes
greater than that needed by the fuel injector. A fuel pressure regulator
located on the fuel rail keeps the fuel supplied to the fuel injectors at
the regulated pressure. The regulated pressure is always kept higher than
the pressure in the intake manifold. Unused fuel is returned to the fuel
tank by a separate return pipe and hose.
The fuel injectors opens according to injection pulse signals from the
powertrain control module. The fuel is injected into the intake ports in a
cone shaped (conic) dispersion pattern.
The 1.3L (VIN 2) engine is designed to use only unleaded fuel. Unleaded
fuel must be used for proper emission control system operation. Using unleaded
fuel will also decrease spark plug fouling and extend engine oil life. Leaded
fuel can damage the emission control system. The use of leaded fuel can
result in the loss of emission warranty coverage.
This vehicle is equipped with an evaporative emission system that minimizes
the release of fuel vapors to the atmosphere.
