Section 08 ENGINE MANAGEMENT (4-TEC)
Subsection 02 (OVERVIEW)
SMR2003-026_08-02A.FM 08-02-5
The intake manifold is mounted on the R.H. side of
the engine block. It provides support for the fuel
injectors, the fuel rail, the EMS ECU, the flame ar-
rester and the throttle body. The air intake manifold
is a resonator between the throttle body and the
cylinder head.
Fuel Rail
The fuel rail is a small tube on which the three
injectors are mounted. It ensures all the time, that
enough fuel at the right pressure can be delivered
to the fuel injectors. The fuel rail is fed by the fuel
pump with a fuel pressure of approximately
303 kPa (44 PSI).
Fuel Injector
Three fuel injectors (one per cylinder) are used to
inject fuel into the intake ports of the cylinder
head.
Flame Arrester
The flame arrester is a tube inside the air intake
manifold. It prevents flames leaving through the
intake system if the engine backfires.
Throttle Body
It is a 52 mm throttle body mounted on intake
manifold. Fitted on the throttle body, the TPS and
the idle bypass valve allow the EMS ECU to con-
trol the RPM while the throttle plate is closed.
FUEL PUMP MODULE
The fuel pump module is located inside the fuel
tank. The module includes fuel pump, fuel pres-
sure regulator and fuel level sensor.
Fuel Pump
It provides fuel pressure and flow rate to the system.
Fuel Pressure Regulator
A fuel pressure regulator controls the pressure in
the system and allows the excess of fuel to return
to the fuel tank. The fuel pressure regulator regu-
lates the fuel pressure at approximately 303 kPa
(44 PSI).
Fuel Filter
A mesh filter is located at the bottom of the fuel
pump module inside the fuel tank.
ELECTRONIC MANAGEMENT
EMS
(Engine Management System)
The EMS is controlled by its ECU.
1. EMS ECU
EMS ECU
The EMS ECU is mounted on the intake manifold.
It controls all engine management functions, by
processing the information given by various sen-
sors.
R1503motr217A
1
R1503motr215A
To Next Page
Loading...
Need help?
General