... 2 Operation of ECD-V3 Pump 2-1 Fuel Suction and Injection The mechanism for the suction and pumping/distribution of the fuel is basically the same as for the previous distributor type pump However, ... between the pressure chamber and pump chamber The pressurized fuel spills into the pump chamber, thus decreasing the pressure in the pressure chamber and ending the pumping of fuel Solenoid Spill Valve ... types of solenoid spill valves: the pilot valve type, and the direct-acting solenoid valve type The direct-acting solenoid valve type is widely used today The pumps are classified into the ECD-V3 ,...