Astro Van L AWD V6-262 4.3L VIN W CPI (1992)
seconds. Fuel enters the fuel meter body through the inlet and flows into the injector cavity. When the control module de-energizes the injector
solenoid, fuel is recirculated through the pressure regulator. Fuel pressure applied to the regulator diaphragm acts against the spring force and opens
the valve from its seat. This allows fuel to flow through the fuel meter body outlet and back to the fuel tank via the fuel return line. When the control
module energizes the injector solenoid, the armature lifts off the six fuel tube seats, delivers fuel through the fuel meter body and out to the six poppet
nozzles. The reduction in fuel recirculation reduces pressure on the regulator diaphragm and the spring force closes the valve toward its seat until
pressure is regained.
When the control module energizes the injector solenoid, pressurized fuel flows through fuel tubes to each poppet nozzle. An increase in fuel pressure
will cause the poppet nozzle ball to open from its seat against the extension spring force and allows fuel to flow from the nozzle (at approximately 350
kPa). De-energizing the injector solenoid closes the armature and reduces the fuel pressure acting on the poppet nozzle ball. The extension spring
closes the ball to the seat and checks pressure between the ball/seat and the injector armature/fuel tube shutoff.
