What does a suction control valve do on a diesel engine?

What does a suction control valve do on a diesel engine?

What Is A Suction Control Valve? The Suction Control Valve or SCV is responsible for the control of fuel pressure inside common rail engines. It allows only the required amount of fuel to be pumped through the system.

Can I clean a suction control valve?

turn wheels to left, remove part of rubber wheel arch cover thing on left hand side, remove connector on back of injector pump, use allen key to undo the two small bolts holding the scv in. remove scv, retain all seals. remove circlip inside scv. remove plunger and clean all debris out of it.

How do suction control valves work?

The electronic control unit (ECU) learns the electrical current that is required by the Suction Control Valve, on the fuel supply pump, to achieve the common rail pressure that is needed to fire-up the engine. When the current is too low, this results in a low rail pressure, preventing the fire- up of the engine.

How do suction valves work?

A manifold vacuum is applied over the diaphragm where the shaft end is towards the opening of the atmosphere. During deceleration, the engine vacuum rises and acts against the spring to push the shaft downwards, thereby blocking the opening through which atmospheric air is passed to the exhaust.

Where is the suction control valve on a Nissan Navara d40?

The SCV is located on the back of the fuel pump.

How many volts is a suction control valve?

Check: Pull out the suction control valve, turn the ignition switch to the ON position, and measure the voltage of the two pins to the ground. Normally, one is 24V and the other is about 3.3V.

What causes code P0089?

Code P0089 may get logged when the powertrain control module (PCM) has determined that the desired and the actual fuel pressures do not correlate. On some vehicles, this code is defined as “Fuel Pressure Regulator 1 Performance”.