Ford F150 Pickup. Manual — part 1362

DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK &
EVAP MONITOR "BYPASS" CHECK is performed.

20. Testing Fuel Vapor Control Valve Tube & Fuel Tank

Disconnect fuel filler pipe hose at tank and plug hose. Perform evaporative emissions system leak test.
See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system does not pass, go to next step.
If system passes, replace fuel tank assembly. Reconnect all components. Perform evaporative emissions
system leak test. If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-
FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS"
CHECK is performed.

21. Testing Fuel Filler Pipe Hose

Disconnect fuel filler pipe hose at fuel filler pipe and plug pipe. Perform evaporative emissions system
leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, replace fuel
filler pipe hose. Reconnect all components. Perform evaporative emissions system leak test. If system
passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE
article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed. If
system did not pass initial test, replace fuel filler pipe assembly. Perform evaporative emissions system
leak test. If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL &
GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is
performed.

Mustang

1. Evaporative Emission System Leak Test - Perform evaporative emissions system leak test. See

EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, go to next step. If system
does not pass, go to step 3 .

2. Testing Evaporative Emission Running Loss System Monitor

Perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article.
Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed. If PCM
DTCs P0442, P0455, P1443 or P1450 are retrieved, see EVAPORATIVE EMISSIONS DIAGNOSTIC
TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE
article for appropriate test procedure. If any other PCM DTCs are retrieved, see DIAGNOSTIC
TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE
article for appropriate test procedure.

3. Testing For Location Of Leak

Connect Evaporative Emissions System Leak Tester (134-00056) to evaporative emissions test port.
Disconnect fuel vapor control valve tube from under vehicle fuel supply and vapor return tube assembly.
Plug both tube open ends. Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops immediately, go
to next step. If pressure does not drop immediately, go to step 9 .

2003 Ford Pickup F150

2003 ENGINE PERFORMANCE System & Component Testing - Gasoline

4. Testing Vapor Hose From Fuel Tank To Under Vehicle Fuel Supply & Vapor Return Tube

Assembly

Disconnect fuel vapor return tube from under vehicle fuel supply and vapor return tube assembly. Plug
fuel supply and vapor return tube assembly. Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops
immediately, go to next step. If pressure does not drop immediately, replace fuel vapor return hose.
Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK
TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL &
GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is
performed.

5. Testing Fuel Supply & Vapor Return Tube Assembly

Disconnect fuel supply and vapor return tube assembly from canister purge outlet tube. Plug EVAP
canister purge outlet tube. Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops immediately, go
to next step. If pressure does not drop immediately, replace fuel supply and vapor return tube assembly.
Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK
TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL &
GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is
performed.

6. Testing Evaporative Emissions Test Port

Disconnect and plug evaporative emissions test port tube from EVAP canister purge outlet tube.
Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops immediately, replace evaporative emissions
test port. Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM
LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-
FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS"
CHECK is performed. If pressure does not drop immediately, reconnect all components and go to next
step.

7. Testing EVAP Canister Purge Outlet Tube

Disconnect and plug EVAP canister purge outlet tube from EVAP canister purge valve. Pressurize system
to 14 in. H2O (3.48 kPa). If pressure drops immediately, replace EVAP canister purge outlet tube.
Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK
TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL &
GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is
performed. If pressure does not drop immediately, reconnect all components and go to next step.

8. Testing EVAP Canister Purge Valve

Disconnect evaporative emission return tube from EVAP canister purge valve. Plug EVAP canister purge
valve. Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops immediately, replace EVAP canister
purge valve. Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS
SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS -
CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR

2003 Ford Pickup F150

2003 ENGINE PERFORMANCE System & Component Testing - Gasoline

"BYPASS" CHECK is performed. If pressure does not drop immediately, replace evaporative emissions
return tube. Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS
SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS -
CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR
"BYPASS" CHECK is performed.

9. Testing Venting Portion Of EVAP System For Blockage

Reconnect all components. Move EVAP tester to fuel filler pipe. Using scan tool, close canister vent
solenoid. Select OUTPUT TEST MODE, FTP and FTP V PID. Select ALL OFF mode. Press START
button on scan tool to close canister vent solenoid. Pressurize system to 14 in. H2O (3.48 kPa). Open
canister vent solenoid. If pressure drops immediately, go to step 14 . If pressure does not drop
immediately, go to next step.

10. Testing Fresh Air Vent Hose For Blockage

Disconnect fresh air vent hose from fuel filler pipe inside trunk. Pressurize system to 14 in. H2O (3.48
kPa). If pressure drops immediately, replace fresh air vent hose. Perform evaporative emissions system
leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform
DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure
PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed. If pressure does not
drop immediately, go to next step.

11. Testing Fresh Air Vent Hose At Fuel Filler Pipe For Blockage

Disconnect fresh air vent hose at fuel filler pipe. Pressurize system to 14 in. H2O (3.48 kPa). If pressure
drops immediately, replace fuel filler pipe. Perform evaporative emissions system leak test. See
EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES
in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE
CHECK & EVAP MONITOR "BYPASS" CHECK is performed. If pressure does not drop immediately,
go to next step.

12. Testing Tank Vapor Valve Tube Assembly For Blockage

Disconnect fuel vapor control valve tube assembly fresh air tube from canister vent solenoid vent hose.
Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops immediately, replace fuel vapor control
valve assembly fresh air tube. Perform evaporative emissions system leak test. See EVAPORATIVE
EMISSIONS SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-
DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK &
EVAP MONITOR "BYPASS" CHECK is performed. If pressure does not drop immediately, go to next
step.

13. Testing Canister Vent Solenoid Hose Assembly For Blockage

Disconnect canister vent solenoid hose from the canister vent solenoid. Pressurize system to 14 in. H2O
(3.48 kPa). If pressure drops immediately, replace canister vent solenoid hose. Perform evaporative
emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system

2003 Ford Pickup F150

2003 ENGINE PERFORMANCE System & Component Testing - Gasoline

passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE
article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed. If
pressure does not drop immediately, replace canister vent solenoid. Perform evaporative emissions
system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes,
perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article.
Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed.

14. Testing EVAP Canister For Leak

Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK
TEST . If system passes, EVAP system diagnosis is complete. Go to step 18 . If system does not pass, go
to next step.

15. Testing EVAP Canister Vent Solenoid For Leak

Disconnect canister vent solenoid from EVAP canister and plug canister. Perform evaporative emissions
system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system does not pass,
go to next step. If system passes, replace canister vent solenoid. Reconnect all components. Perform
evaporative emissions system leak test. If system passes, perform DRIVE CYCLES in SELF-
DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK &
EVAP MONITOR "BYPASS" CHECK is performed.

16. Testing EVAP Canister

Disconnect EVAP canister inlet elbow tube and plug tube. Perform evaporative emissions system leak
test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system does not pass, go to next
step. If system passes, replace EVAP canister. Perform evaporative emissions system leak test. If system
passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE
article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed.

17. Testing EVAP Canister Inlet Elbow Tube

Disconnect fuel vapor control valve tube assembly from EVAP canister inlet elbow tube. Plug fuel vapor
control valve tube assembly. Perform evaporative emissions system leak test. See EVAPORATIVE
EMISSIONS SYSTEM LEAK TEST . If system passes, replace EVAP canister inlet elbow tube.
Perform evaporative emissions system leak test. If system passes, perform DRIVE CYCLES in SELF-
DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK &
EVAP MONITOR "BYPASS" CHECK is performed. If system does not pass, replace fuel vapor control
valve tube assembly. Perform evaporative emissions system leak test. If system passes, perform DRIVE
CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING
CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed.

18. Testing Fuel Filler Pipe Grommet

Reconnect all components. Move EVAP tester to fuel filler pipe. Using scan tool, close canister vent
solenoid. Select OUTPUT TEST MODE, FTP and FTP V PID. Select ALL OFF mode. Press START
button on scan tool to close canister vent solenoid. Pressurize system to 14 in. H2O (3.48 kPa). If

2003 Ford Pickup F150

2003 ENGINE PERFORMANCE System & Component Testing - Gasoline