C 2500 3/4 Ton Pickup 2WD V8-379 6.2L DSL VIN J FI (1984)
Fig. 4 Fuel filter/water separator. 1984---87 C, K, R & V models
COMPONENTS
The fuel system consists of a tank, fuel pickup assembly, fuel filters, mechanical fuel pump, fuel line heater, and an injection pump, injector lines and
individual fuel injectors for each cylinder. On 1982---83 models, the fuel pickup incorporates a water in fuel detector, Fig. 1, primary and secondary fuel
filters are used, and a water drain siphon valve is included in the system, Fig. 2. On 1984---87 models, a single fuel filter assembly is used, which
includes the water in fuel sensor, water separator and drain, and the fuel heater, Figs. 3 and 4. In addition, 1984---87 models are equipped with a low
pressure switch which illuminates a warning lamp should the fuel filter become clogged.
1984---87
Fuel is drawn from the tank by the camshaft drive mechanical mechanical pump. Fuel is then pumped through the fuel filter and heater assembly
mounted on the front of the dash on C, K, R and V models or under the air cleaner on G and P models. In the filter, contaminants are strained out of the
fuel, water is separated and the fuel is heated to prevent formation of wax deposits. From the filter fuel is delivered to the high pressure rotary vane type
injection pump. The injection pump meters and pressurizes the fuel, then directs it through the injector lines to the injector nozzles. The eight high
pressure injector lines are all of equal length, although their shapes may be different, in order to prevent any difference in injection timing between
cylinders.
Fig. 3 Fuel filter/water separator. 1984---87 G & P models
