Econoline E350 1 Ton V8-5.4L SOHC VIN L (1999)
Fuel Filler Cap: Description and Operation
The fuel tank filler cap:
^
relieves system pressures above 14 kPa (2 psi).
^
relieves system vacuum below 3.8 kPa (0.5 psi).
Ford Workshop Service and Repair Manuals
Fuel Filter >
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