Fuel Delivery: Notes

A mechanical pump is mounted on the right side of engine block. Camshaft eccentric drives pump. Pump pulls fuel from the fuel tank through a primary filter. The fuel is then pumped through a secondary filter, mounted on firewall (pickups) or rear of air cleaner (vans), and to the injection pump.

The 6.2L diesel engine uses a mechanical, high pressure rotary diesel injection pump, which is gear-driven by camshaft at camshaft speed. Pump injects a precisely metered amount of fuel to each cylinder at the proper time.

High pressure fuel lines carry the fuel to an injection nozzle in each cylinder. All fuel lines are the same length to ensure no variance in timing. A rotary fuel metering valve controls engine RPM. As the accelerator pedal is depressed, throttle linkage opens fuel metering valve to allow increased fuel delivery.