Question about 2002 Ford Expedition
You have a vent solenoid and a purge solenoid and a gas tank pressure sensor and a charcoal cannister, you also have vacuum lines, fuel cap, filler neck and the fuel pump seal itself which can all have a small leak.
So what a shop would do is apply a slight bit of pressure using a smoke machine so as to see where smoke leaks out. Also they would check the other parts for proper function. If everything checks out then in some cases a reprogram for the computer is the only fix.
Posted on Aug 07, 2010
VAPOR MANAGEMENT VALVE STICKING
Posted on Aug 06, 2010
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Posted on Jan 02, 2017
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