E 150 V8-4.6L SOHC VIN W (2004)
Fuel Pressure Test Port: Description and Operation
Natural Gas Fuel System
SCHRADER/SERVICE VALVE
schrader/service valve (if equipped) provides a service port to the low pressure fuel system. This valve is needed to relieve the pressure in the system
before and during service. This valve could also be used to monitor the pressure near the injectors during diagnostic procedures.
