FUEL PRESSURE REGULATOR

Genuine Nissan (22670-VB000)

Definition of Product 22670-VB000

The 22670-VB000 is a Fuel Pressure Regulator from Nissan.

Its main function is to maintain a constant fuel pressure inside the fuel rail so that the injectors receive fuel in the correct quantity and at the ideal pressure, ensuring proper combustion in the engine’s cylinders.

It operates through an internal valve that controls the return of excess fuel to the tank if the pressure exceeds the required level.

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Importance of the Fuel Pressure Regulator

1. Stabilizes engine performance — Prevents fuel from being too much or too little.

2. Improves fuel economy — Correct fuel pressure reduces wastage.

3. Protects the fuel injection system — Prevents excessive pressure that could damage injectors or the fuel pump.

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Symptoms of a Faulty Fuel Pressure Regulator

If it fails or becomes inaccurate, you may notice:

Symptom Explanation

Loss of power or engine hesitation Low pressure prevents enough fuel from reaching the engine.

Increased fuel consumption High pressure injects more fuel than needed.

Hard starting (especially when cold) Pressure leaks from the lines after the engine is turned off.

Black smoke from the exhaust Sign of excessive fuel burning.

Strong smell of gasoline Internal leakage or damaged regulator diaphragm.

Unstable idle speed Pressure fluctuates irregularly.

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🔧 Note:

A faulty fuel pressure regulator can show symptoms similar to other fuel system issues (such as a bad fuel pump or clogged injectors), so it’s best to check the fuel pressure with a gauge before replacing the part.