0928400820 Fuel Pressure Regulator Valve, Metering Unit for Zdtopa Engine, Replacement 0 928 400 820 0928 400 820 for Common Rail Diesel Fuel System

Product SpecificationsPart Numbers: 0928400820, 0 928 400 820, 0928 400 820Product Type: Fuel pressure regulator valve / fuel metering unitApplication: Common rail diesel injection systemVoltage: Typically 12V or 24V (PWM controlled by ECU)Mounting: 2-bolt flange on high pressure fuel pumpSeal Type: O-ringConnector Type: 2-pin sealed electrical connectorMaterial: Steel body with composite plastic coil coverCompatible ApplicationsFor Zdtopa diesel engines with common rail injectionFor CP1, CP3, or similar high pressure pumps using 0928400820 regulatorOther common rail diesel systems with regulator (verify part number match)Fuel Metering Unit Function on Common Rail DieselInlet Regulation: The 0928400820 valve controls fuel volume entering the high pressure pumpRail Pressure Control: ECU adjusts 0928400820 metering unit to maintain desired rail pressure (typically 300-2000 Bar)PWM Operation: Pulse width modulation signal from ECU varies how far the 0928400820 valve opensFail-Safe Mode: If 0928400820 regulator loses power or fails, pump defaults to minimal fuel delivery (engine may not start or runs at reduced power)Pressure Bypass: Excess fuel not pumped to rail returns to tank through the 0928400820 valve

• 📋 Part Number Verification - 0928400820 fuel pressure regulator valve replaces for numbers 0928400820, 0 928 400 820, and 0928 400 820. The fuel metering unit is original equipment on Zdtopa common rail diesel engines. Verify your old valve matches this number before ordering this 0928400820 pressure regulator.
• ⚙️ Fuel System Function - 0928400820 metering unit controls fuel flow to the high pressure pump. The ECU sends a PWM signal to this 0928400820 valve, which regulates how much fuel enters the pumping chamber. A failing 0928400820 pressure regulator on your Zdtopa engine causes low rail pressure, hard starting, or reduced power. The engine may enter limp mode or stall under load.
• 🔧 Common Rail Application - 0928400820 fuel pressure regulator is used in common rail diesel injection systems. The 0928400820 metering unit mounts on the high pressure fuel pump (CP1, CP3, or similar). Compatible with Zdtopa engines and other common rail diesels using for 0928400820 regulator. Verify your pump type before ordering this 0928400820 valve.
• ⚠️ Failure Symptoms - If your Zdtopa engine has extended crank time before starting, the 0928400820 fuel pressure regulator may be sticking. Check engine light with low rail pressure code (P0087) on your common rail system points to failed 0928400820 metering unit. Engine lacks power under load or stalls intermittently - failing 0928400820 valve not regulating fuel correctly on your diesel engine.
• 🔧 Installation Note - Installing 0928400820 fuel pressure regulator requires relieving fuel pressure first. The 0928400820 metering unit mounts with two bolts on the high pressure pump. New O-rings required (verify if included). Torque to 8-10 Nm (71-88 in-lbs). Do not over-tighten this 0928400820 valve on your Zdtopa common rail system. Professional diesel technician installation recommended.