Section 08 ENGINE MANAGEMENT (4-TEC)
Subsection 01 (OVERVIEW)
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INTAKE MANIFOLD (4-TEC SUPERCHARGED)
1. Engine Control Module (ECM)
2. Fuel rail
3. Injector
4. Throttle body
5. Ignition coil
6. Manifold air pressure sensor (MAPS)
7. Manifold air temperature sensor (MATS)
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INTAKE MANIFOLD (4-TEC SUPERCHARGED INTERCOOLED)
1. Engine Control Module (ECM)
2. Fuel rail
3. Injector
4. Throttle body
5. Ignition coil
6. Manifold air pressure sensor (MAPS)
7. Intercooler
8. Intercooler outlet
9. Intercooler inlet
10.Manifold air temperature sensor (MATS)
The intake manifold is mounted on the RH side of
the engine block. It provides support for the fuel
injectors, the fuel rail, the ECM, the flame arrester
and the throttle body. The air intake manifold is a
resonator between the throttle body and the cylin-
der 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.
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.
Intercooler
The intercooler is a tube which comprises smaller
tubes. Water taken from the outside of the wa-
tercraft is pumped through the smaller tubes and
cools down the intake air. Therefore the air densi-
ty is higher and you get more air into the engine.
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 ECM to control the
RPM while the throttle plate is closed.
smr2004-Complete Line Up 395
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