How to remove and install the fuel pressure regulator on Mitsubishi Lancer?

To install and remove the fuel pressure regulator on CE models, defuel the fuel system and then reduce the pressure. The second step is to remove the vacuum hose and the fuel return line of the fuel pressure regulator. Take the retaining bolts out and take the regulator out of the fuel rail, and dispose of the O ring. To install it, one needs a new O ring, lubricated using clean fuel and all connections are tightened. Ensure the vacuum hose is in a good condition and well attached and then test the fuel system to rule out any external leakage. In CG and CH models the fuel pressure regulator is built in the fuel pump assembly, which is in the fuel tank, and thus can be removed and replaced separately.

Genuine Mitsubishi Lancer Fuel Pressure Regulator

Fuel Tank Pressure Regulator

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3 Fuel Pressure Regulators found

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Mitsubishi Lancer Tank Pressure Sensor Part Number: MD322973
$153.61 MSRP: $208.15
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Product Specifications
- Other Name: Sensor, Fuel Vapor; Fuel Tank Pressure Sensor; Fuel Pressure Regulator; Vapor Pressure Sensor; Vapor Valve; Sensor
- Warranty: This genuine part is guaranteed by Mitsubishi's factory warranty.
Fits the following Vehicles:
- 2003-2006 Mitsubishi Lancer | Evolution, Evolution MR, Evolution RS, Evolution SE | 4 Cyl 2.0 L GAS
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Mitsubishi Lancer Tank Pressure Sensor Part Number: 8651A025
$175.94 MSRP: $238.40
You Save: $62.46 (27%)
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Product Specifications
- Other Name: Sensor, Fuel Vapor; Fuel Pressure Regulator; Vapor Pressure Sensor; Pressure Sensor; Vapor Valve; Vapor Separator; Sensor
- Warranty: This genuine part is guaranteed by Mitsubishi's factory warranty.
Fits the following Vehicles:
- 2008-2017 Mitsubishi Lancer | DE, ES, ES Sportback, Evolution GSR, Evolution MR, Evolution MR Touring, Evolution SE, GT, GT Sportback, GTS, GTS Sportback, Ralliart, Ralliart Sportback, SE, SEL | 4 Cyl 2.0 L GAS, 4 Cyl 2.4 L GAS
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Mitsubishi Lancer Vapor Valve Part Number: MR487890
$9.98 MSRP: $13.00
You Save: $3.02 (24%)
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Product Specifications
- Other Name: Valve, Fuel Filler Neck; Fuel Pressure Regulator; Valve
- Warranty: This genuine part is guaranteed by Mitsubishi's factory warranty.
Fits the following Vehicles:
- 2008, 2003-2006 Mitsubishi Lancer | DE, ES, Evolution, Evolution MR, Evolution RS, Evolution SE, GTS | 4 Cyl 2.0 L GAS

Mitsubishi Lancer Fuel Pressure Regulator

The Fuel Pressure Regulator of Mitsubishi Lancer maintains the pressure of the fuel in a certain range so that an engine gets its required amount of fuel. A spring and diaphragm assembly is found within the regulator mounted on the Mitsubishi Lancer fuel rail. The Fuel Pressure Regulator is connected to the engine manifold vacuum via a vacuum port, while the outlet is connected to the fuel return line that sends the excess fuel back to the tank. A Mitsubishi Lancer Fuel Pressure Regulator valve opens due to idle vacuum that pulls against a spring and diaphragm, which allows excess fuel to be returned and pressure to be lowered. When the throttle opens and vacuum drops, the spring capability closes the passage, returning pressure to satisfy increased injector pulse width. Fuel pressure will become too high if the Fuel Pressure Regulator sticks closed, resulting in a rich mixture causing reduced economy along with higher emissions. An internal leak or broken spring causes a lean condition by lowering pressure. Testing the operation of a Mitsubishi Lancer is done by removing the vacuum hose, then checking whether the pressure shows it to respond. The fuel pressure should decrease after applying an external vacuum using a hand pump; non-response indicates a defective unit or obstruction in the return path. If pressure remains low and doesn't rise when the return line is pinched shut, then it is likely the pump that is the problem.

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Mitsubishi Lancer Fuel Pressure Regulator Parts Questions & Experts Answers

Tank Pressure Sensor
MD322973
Q: How to remove and install the fuel pressure regulator on Mitsubishi Lancer?
A:
To install and remove the fuel pressure regulator on CE models, defuel the fuel system and then reduce the pressure. The second step is to remove the vacuum hose and the fuel return line of the fuel pressure regulator. Take the retaining bolts out and take the regulator out of the Fuel Rail, and dispose of the O ring. To install it, one needs a new O ring, lubricated using clean fuel and all connections are tightened. Ensure the vacuum hose is in a good condition and well attached and then test the fuel system to rule out any external leakage. In CG and CH models the fuel pressure regulator is built in the Fuel Pump assembly, which is in the Fuel Tank, and thus can be removed and replaced separately.