Jaguar Mechanical Fuel Pump - Delphi AJ813784

Product Information

A direct injection high pressure fuel pump (HPFP) is a critical component in modern gasoline direct injection (GDI) engines. Unlike traditional fuel pumps, it boosts fuel pressure to extremely high levels (often over 2,000 psi) so fuel can be directly injected into the combustion chamber. This enables better fuel atomization, improved efficiency, and higher power output. The HPFP is typically driven by the camshaft and works in tandem with a low-pressure fuel pump. Over time, wear, contamination, or internal failure can lead to drivability issues.

• Engine performance problems – hard starting, hesitation, misfires, or loss of power under load.
• Fuel-related issues – check engine light, lean/rich codes, or reduced fuel economy.
• Noises or leaks – ticking/whining sounds from the pump or visible fuel leakage at the pump area.

About Delphi

With a presence in more than 150 countries, and a global network of over 2750 service centers, Delphi provides OE specification end-to-end solutions from components to sophisticated software solutions.

With a wide-ranging portfolio including gasoline fuel systems, diesel fuel systems, maintenance solutions, engine management, and vehicle electronics, backed by OE-level diagnostic and test equipment, training, and technical information, Delphi enables garages to service and repair vehicles right the first time.

Delphi's portfolio includes gasoline fuel systems, diesel fuel systems, maintenance solutions, engine management, and vehicle electronics, plus training, diagnostics, and test equipment. We serve the passenger and commercial vehicle segments, as well as agricultural, marine, and industrial vehicle markets worldwide.