Injection Control Pressure Sensor; High Pressure Oil Rail; Port Plugs And Tubes - International VT 275 V6 Manual

Injection Control Pressure Sensor

• The Injection Control Pressure (ICP)
sensor mounts on the right bank high-
pressure rail but protrudes through the
valve cover and is accessible without
removing the valve cover.
• The sensor measures pressure in the rail
and produces a signal that is sent to the
ECM. The ICP sensor is the feedback
device for the operation of the IPR. The
ECM constantly checks the pressure to
determine if the system is performing
correctly. When the
variations, the IPR command is corrected
to achieve the desired results.

High Pressure Oil Rail

• A high-pressure rail is mounted over each
bank of injectors. The rail serves as a
reservoir of high-pressure oil for use by the
injectors. The rail is connected to each
injector with a short tube that fits through
the injector O-ring. The tubes have the
ability to swivel to align with the
injector openings.
• The rail does not need to be drained
before removal.

Port Plugs and Tubes

• There is one O-ring sealed case-to-head
tube assembly for each bank of cylinders.
The case-to-head tube connects the
branch tube assembly in the tappet area to
the rail through the rear port plug. The rear
port plug contains a one-way check valve
that dampens pressure pulsations caused
by injector operation.
• The front port plug is used to block oil from
leaking into the valve train area. Both port
plugs must be in place for the engine to
build ICP sufficient to start the engine.
ECM detects
R R E E A A R R P P O O R R T T P P L L U U G G
& & C C H H E E C C K K V V A A L L V V E E S S
International
FUEL MANAGEMENT SYSTEM
I I C C P P S S E E N N S S O O R R
R R E E A A R R P P O O R R T T P P L L U U G G
R R E E A A R R P P O O R R T T P P L L U U G G
F F R R O O N N T T P P O O R R T T P P L L U U G G
H H I I G G H H P P R R E E S S S S U U R R E E R R A A I I L L
F F R R O O N N T T
P P O O R R T T
P P L L U U G G
® VT 275 V6 Engine
R R I I G G H H T T B B A A N N K K
V V A A L L V V E E C C O O V V E E R R
I I C C P P S S E E N N S S O O R R
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