Ford 2003 Mustang Workshop Manual page 2160

D6 TEST FOR BLOCKAGE IN FUEL FILLER TUBE
ASSEMBLY
Disconnect the tank vapor recirculation tube from
the fuel filler pipe and plug both openings.
Pressurize the EVAP system to 3.48 kPa (14
inches H O).
2
Remove the plug from the vapor recirculation tube.
Does the pressure drop immediately?
D7 TEST FOR BLOCKAGE IN FRESH AIR VENT
HOSE
Disconnect the fresh air vent hose from the fuel
filler pipe inside the luggage compartment.
Pressurize the EVAP system to 3.48 kPa (14
inches H O).
2
Does the pressure drop immediately?
D8 TEST FOR BLOCKAGE IN THE FRESH AIR TUBE
ON THE FUEL FILLER PIPE ASSEMBLY
Disconnect the fresh air tube from the fuel filler
pipe assembly.
No
GO to D6 .
Yes
INSTALL a new fuel vapor control
valve tube assembly. REFER to
Vapor Control Tube Assembly Valve
in this section. CARRY OUT a leak
test. REFER to Evaporative Emission
System Leak Test in this section. If
the system passes the leak test,
CARRY OUT the evaporative
emission repair verification drive
cycle. REFER to Evaporative
Emission Repair Verification Drive
Cycle in this section.
No
INSTALL a new fuel filler pipe
assembly. REFER to Section 310-
01 . CARRY OUT a leak test. REFER
to Evaporative Emission System Leak
Test in this section. If the system
passes the leak test, CARRY OUT
the evaporative emission repair
verification drive cycle. REFER to
Evaporative Emission Repair
Verification Drive Cycle
section.
Yes
INSTALL a new fresh air vent hose.
CARRY OUT a leak test. REFER to
Evaporative Emission System Leak
Test in this section. If the system
passes the leak test, CARRY OUT
the evaporative emission repair
verification drive cycle. REFER to
Evaporative Emission Repair
Verification Drive Cycle
section.
No
GO to D8 .
Yes
INSTALL a new fuel filler pipe
assembly. REFER to Section 310-
01 . CARRY OUT a leak test. REFER
to Evaporative Emission System Leak
Test in this section. If the system
passes the leak test, CARRY OUT
the evaporative emission repair
verification drive cycle. REFER to
Fuel
in this
in this