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Fuel Pressure Regulator - With Mitsubishi 2.4L Engine
Description
The fuel pressure regulator is connected to the fuel rail. The fuel pressure regulator has a vacuum connection to it.
The fuel pressure regulator is used to regulate the fuel pressure in the fuel system.
NOTE :
The 2.4L is the ONLY engine that uses an external fuel pressure regulator.
Operation
The fuel pressure regulator is designed to keep the fuel pressure in the fuel system at a constant pressure. It does
this with a spring-loaded diaphragm that controls a valve. The valve, when opened by excessive pressure in the fuel
lines, uncovers a fuel line that returns excess fuel to the fuel tank. The vacuum connection is there to help reduce
emissions during deceleration. During deceleration, the vacuum connection serves to open the fuel return valve
wider, which reduces pressure in the system and prevents excess hydrocarbon emissions due to less fuel being
injected as a result of the lower pressure in the system.
Removal & Installation
WARNING!
Release fuel system pressure before servicing fuel system components. Service vehicles in well ventilated areas
and avoid ignition sources. Never smoke while servicing the vehicle. This may result in personal injury or death.
1. Release the fuel system pressure (See Fuel Pressure Relief Procedure in Section 04 Fuel Delivery).
2. Disconnect the negative battery cable.
Chery Automobile Co., Ltd.
ON-VEHICLE SERVICE
04
LTSM040007
23
04–
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