2500 4x2 Pickup L6-359 5.9L DSL Turbo (1994)
Fuel Return Line: Description and Operation
Fuel Drain Manifold
OPERATION
Some fuel is continually vented from the fuel injection pump to cool the pump and the fuel injectors. During injection, a small amount of fuel
flows past the injector nozzle and is not injected into the combustion chamber. This fuel drains into the fuel drain manifold. Fuel in the drain
manifold is then routed back to the fuel filter/water separator.
