Ford 2003 Mustang Workshop Manual page 2164

Disconnect the fuel supply-return and vapor tube
assembly from the EVAP canister purge outlet
tube, and plug the EVAP canister purge outlet
tube.
Pressurize the EVAP system to 3.48 kPa (14
inches H O).
2
Does the pressure drop immediately?
E6 TEST FOR EVAPORATIVE EMISSIONS TEST
PORT LEAK
Disconnect the evaporative emissions test port
tube from the EVAP canister purge outlet tube and
plug the evaporative emissions test port tube.
Pressurize the EVAP system to 3.48 kPa (14
inches H O).
2
Does the pressure drop immediately?
E7 TEST FOR EVAP CANISTER PURGE OUTLET
TUBE LEAK
Disconnect the EVAP canister purge outlet tube
from the evaporative emissions canister purge
valve and plug the EVAP canister purge outlet
tube.
Pressurize the EVAP system to 3.48 kPa (14
inches H O).
2
Does the pressure drop immediately?
E8 TEST FOR LEAK AT EVAPORATIVE EMISSIONS
PURGE VALVE
Disconnect the evaporative emissions return tube
from the evaporative emissions canister purge
Yes
GO to E6 .
No
INSTALL a new fuel supply-return
and vapor tube assembly. CARRY
OUT a leak test. REFER to
Evaporative Emission System Leak
Test on 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 evaporative
emissions test port. REFER to
Evaporative Emission Test Port
CARRY OUT a leak test. REFER to
Evaporative Emission System Leak
Test on 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
RECONNECT the evaporative
emissions test port tube to the EVAP
canister purge outlet tube. GO to
Yes
INSTALL a new EVAP canister purge
outlet tube. CARRY OUT a leak test.
REFER to Evaporative Emission
System Leak Test on 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
RECONNECT the EVAP canister
purge outlet tube. GO to
Yes
INSTALL a new evaporative
in this
.
in this
E7 .
E8 .