Description
Injection Pump 1.4 HDi 16V 8HY/8HV Delphi For Citroën And Peugeot Vehicles. With Fuel Regulator, Without Pulley.
This Delphi high-pressure injection pump is designed for 1.4 HDi 16V (engine codes 8HY / 8HV) applications used on a range of Citroën and Peugeot models. It controls precise fuel delivery to the injectors via an integrated fuel regulator and is supplied without a pulley, making it suitable for vehicles that use the original drive coupling. Commonly searched by product numbers, this unit is a direct-fit replacement where listed and valued by professional mechanics and skilled DIY technicians for restoring diesel performance, drivability and emissions compliance.
Technical Information
- Manufacturer: Delphi
- Model: 1.4 HDi 16V (8HY / 8HV)
- Product Codes: 9643567280, 9652615680
- Other Numbers: 1920ET, 1921N2, R9042Z021A
- Applicable Vehicles: Citroën C3, Peugeot 1007 and other Stellantis models equipped with 1.4 HDi 16V engines (8HY / 8HV)
Function And Symptoms
The high-pressure injection pump meters and delivers fuel to the injectors at the correct pressure and timing. The integrated fuel regulator adjusts fuel delivery according to engine load and speed. Faulty pumps typically cause hard starting, loss of power, rough idle, excessive smoke, fuel odor, or complete no-start. Visible external fuel leaks or contaminated fuel are also common indicators of pump issues.
How Replacement Is Performed
Replacement requires basic diesel system knowledge and careful attention to timing and bleeding procedures. Typical steps:
- Disconnect the battery and relieve fuel system pressure.
- Remove intake components and engine covers to access the pump.
- Label and disconnect fuel lines and electrical connectors from the pump.
- Remove mounting bolts and extract the pump. Note or mark the pump timing position before removal.
- Install the new pump in the same orientation; secure mounting bolts to the manufacturer’s torque sequence if available.
- Reconnect lines and electrical connectors, prime the system to remove air, and bleed the fuel system according to the vehicle procedure.
- Verify engine starts and runs smoothly. Final checks should include leak inspection and road test to confirm drivability.
Installation Recommendations
- Ensure the replacement unit matches engine code (8HY/8HV) and listed product numbers before fitting.
- Work in a clean area to avoid introducing contaminants into the fuel system. Replace any brittle or damaged fuel hoses and seals during installation.
- Mark timing positions before removal and follow the vehicle manufacturer’s timing and priming procedures. Improper timing can cause poor performance and engine damage.
- Prime and bleed the fuel system carefully to prevent air locks. Use correct bleeding tools or follow the vehicle’s recommended sequence.
- After installation, inspect for leaks at all connections and perform a controlled road test to confirm normal operation.
Why The Part Most Commonly Fails
Primary causes of injection pump failure include contaminated fuel (water, dirt, or microbial growth), long-term wear of internal components, poor lubrication from low-quality fuel, and corrosion. Overheating or exposure to debris during previous service can also damage internal tolerances. Inadequate bleeding after prior interventions or fitting an incompatible unit will cause starting and running issues. Regular fuel filter replacement and using clean diesel reduce the risk of premature pump failure.
Service life varies with usage and maintenance; many pumps perform reliably for well over 100,000 km when fed clean fuel and maintained correctly. When replacing the pump, confirm compatibility with the engine code and product numbers listed above for a correct fit and operation.
