PINPOINT TEST D: HISS WHEN OPENING FUEL CAP
Start the engine and allow to idle.
Monitor the FTP V and EVAPPDC PIDs.
When PID EVAPPDC is zero, is PID FTP V reading below 2.40
volts?
Test Step Result / Action to Take
D1 TEST FOR EVAP CANISTER, CANISTER
VENT SOLENOID AND CANISTER VENT HOSE
ASSEMBLY BLOCKAGE
Connect the Evaporative Emission System
Leak Tester to the fuel filler cap.
Pressurize the EVAP system to 3.48 kPa
(14 inches H
2
O).
Does the pressure drop immediately?
Yes
The EVAP system has passed the EVAP canister and bracket assembly blockage test. GO to D6.
No
For vehicles equipped with a canister vent hose assembly, GO to D2.
For vehicles equipped with a canister vent solenoid, GO to D3.
For all others, GO to D4.
D2 TEST FOR CANISTER VENT HOSE
ASSEMBLY BLOCKAGE
Disconnect the EVAP canister vent hose
assembly from the EVAP canister.
Connect the Evaporative Emission System
Leak Tester to the fuel filler pipe.
Pressurize the EVAP system to 3.48 kPa
(14 inches H
2
O).
Does the pressure drop immediately?
Yes
INSTALL a new EVAP canister vent solenoid vent hose assembly. CARRY OUT the evaporative emission
system 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
GO to D4.
D3 TEST FOR CANISTER VENT SOLENOID
BLOCKAGE
Remove the canister vent solenoid from the
lower EVAP canister.
Connect the Evaporative Emission System
Leak Tester to the fuel filler pipe.
Pressurize the EVAP system to 3.48 kPa
(14 inches H
2
O).
Does the pressure drop immediately?
Yes
INSTALL a new canister vent solenoid. REFER to Evaporative Emission Canister Vent Solenoid in this
section. CARRY OUT the evaporative emission system 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
GO to D4.
D4 TEST EVAP CANISTERS FOR BLOCKAGE
Disconnect the EVAP canister tube (from
the fuel tank) at the F-fitting from the EVAP
canister.
Connect the Evaporative Emission System
Leak Tester to the fuel filler pipe.
Pressurize the EVAP system to 3.48 kPa
(14 inches H
2
O).
Does the pressure drop immediately?
Yes
INSTALL new EVAP canisters. REFER toEvaporative Emission Canister and Purge Valve in this section.
CARRY OUT the evaporative emission system 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
GO to D5.
D5 TEST EVAP CANISTERS FOR TUBE OR
FUEL VAPOR VENT VALVE ASSEMBLY
BLOCKAGE
Disconnect the fuel vapor vent valve
assembly from the EVAP canister tube.
Connect the Evaporative Emission System
Leak Tester to the fuel filler pipe.
Pressurize the EVAP system to 3.48 kPa
(14 inches H
2
O).
Does the pressure drop immediately?
Yes
INSTALL a new EVAP canister tube and/or fuel vapor tube(s) between the fuel tank and the EVAP canister
and bracket assembly. CARRY OUT the evaporative emission system 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 vapor vent valve(s) or assembly. REFER toFuel Vapor Tube Assembly in this section.
CARRY OUT the evaporative emission system 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.
D6 TEST FOR BLOCKAGE BETWEEN THE
EVAP CANISTER PURGE VALVE AND THE
FUEL TANK
Remove the fuel vapor hose (from the fuel
tank) at the EVAP canister purge valve.
Connect the Evaporative Emission System
Leak Tester to the fuel filler pipe.
Key in ON position.
For vehicles equipped with a canister vent
solenoid, close the canister vent solenoid.
Refer to Canister Vent Solenoid Closing
Procedure in this section.
For vehicles without a canister vent
solenoid, plug the canister vent hose
assembly or plug the canister vent cap.
Pressurize the EVAP system to 3.48 kPa
(14 inches H
2
O).
Does the pressure drop immediately?
Yes
The EVAP system has passed all the blockage tests. RECONNECT all components.
For vehicles equipped with a canister vent solenoid, CARRY OUT the evaporative emission system leak
test. REFER toEvaporative 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.
For vehicles not equipped with a canister vent solenoid, PLUG the canister vent hose assembly or the
canister vent cap. CARRY OUT the evaporative emission system 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
2004 Freestar/Monterey Workshop Manual
http://www.fordtechservice.dealerconnection.com/pubs/content/~WS4W/~MUS~LEN/20/
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