How to Adjust Mazda 323 Fuel Pressure Regulating Valve

1, and the oil pressure is coordinated by the spring and the vacuum degree of the air chamber. When the oil pressure is higher than the standard value, the high-pressure fuel pushes the diaphragm upward, the ball valve opens, and the excess fuel flows back to the oil tank through the oil return pipe.

2. When the pressure is lower than the standard value, the spring will compress the diaphragm, close the ball valve and stop oil return. The function of the pressure regulator is to keep the pressure in the oil circuit constant. If the oil pressure is too low, the injector will inject too little or no oil. If the oil pressure is too high, it will damage the oil circuit or the injector.

3. There is a diaphragm inside the pressure regulator, which can control the opening and closing of the pressure valve. When the oil pressure is lower than a certain value, the pressure valve is closed and the oil pump increases the pressure in the oil circuit. When the specified pressure is exceeded, the diaphragm opens, and the overpressure fuel flows back to the fuel tank through the oil return pipe, which plays a role in reducing pressure.