Ford F150 Pickup. Manual - part 1358

 
Disconnect EVAP canister purge outlet tube at fuel vapor valve tube assembly that runs from EVAP 
purge valve to fuel tank. Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops immediately, go to 
step 9 . If pressure does not drop immediately, go to next step. 

8. Testing Evaporative Emissions Test Port 

 
Disconnect evaporative emissions test port from EVAP canister purge outlet tube. 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, 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. 

9. Testing Fuel Vapor Valve Tube Assembly 

 
Disconnect EVAP canister purge outlet tube at fuel vapor valve tube assembly. Connect EVAP tester to 
fuel filler tube. Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops immediately, reconnect all 
components. 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, replace fuel vapor valve 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.  

Focus & ZX2 

1. Testing EVAP Canister & Canister Vent Solenoid Flow - Connect Evaporative Emissions System 

Leak Tester (134-00056) to test port. Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops 
immediately, EVAP canister and vent solenoid are not blocked, go to step 5 . If pressure does not drop 
immediately, go to next step. 

2. Testing Canister Vent Solenoid Hose Assembly 

 
Disconnect canister vent solenoid hose assembly. Pressurize system to 14 in. H2O (3.48 kPa). If pressure 
drops immediately, replace canister vent solenoid hose 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. If pressure does not 
drop immediately, go to next step. 

 

2003 Ford Pickup F150 

2003 ENGINE PERFORMANCE System & Component Testing - Gasoline

  

3. Testing Canister Vent Solenoid For Blockage 

 
Remove canister vent solenoid. Canister vent solenoid is under rear of vehicle near EVAP canister. 
Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops 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. If pressure does not drop immediately, go to next step. 

4. Testing EVAP Canister 

 
Disconnect EVAP canister tube at canister. Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops 
immediately, replace EVAP canister. 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, 
replace EVAP canister 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. 

5. Testing Fuel Vapor Control Valve Tube Assembly (With ORVR Only) 

 
Disconnect fuel vapor valve from fuel vapor control valve tube. Plug hose on fuel vapor valve assembly 
and at fuel vapor control valve tube assembly. Move EVAP tester to fuel filler pipe. Pressurize system to 
14 in. H2O (3.48 kPa). If pressure drops immediately, 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 and go to next step. If pressure 
does not drop immediately, replace fuel vapor control valve 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 Fuel Vapor Valve Assembly 

 
Disconnect fuel vapor valve tube assembly at EVAP canister tube "T" fitting connector and at fuel vapor 
valve. Plug both open ports at tube assembly. Pressurize system to 14 in. H2O (3.48 kPa). If pressure 
drops immediately, reconnect all components. 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, 
replace fuel vapor valve 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. 

 

2003 Ford Pickup F150 

2003 ENGINE PERFORMANCE System & Component Testing - Gasoline

  

F150 Pickup 

1. Testing EVAP Canister & Canister Vent Solenoid Flow - Connect Evaporative Emissions System 

Leak Tester (134-00056) to fuel filler pipe. Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops 
immediately, EVAP system is not blocked, go to step 5 . If pressure does not drop immediately, go to 
next step. 

2. Testing Canister Vent Hose Assembly For Blockage 

 
Disconnect canister vent hose assembly from EVAP canister. EVAP canister is under rear of vehicle near 
left frame rail. Pressurize system to 14 in. H2O (3.48 kPa). If pressure does not drop immediately, go to 
next step. If pressure drops immediately, replace canister vent solenoid hose 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. 

3. Testing Canister Vent Solenoid For Blockage 

 
Remove canister vent solenoid. Canister vent solenoid is located next to EVAP canister. Pressurize 
system to 14 in. H2O (3.48 kPa). If pressure does not drop immediately, go to next step. If pressure drops 
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. 

4. Testing EVAP Canister For Blockage 

 
Disconnect EVAP purge outlet tube from EVAP canister. Pressurize system to 14 in. H2O (3.48 kPa). If 
pressure does not drop immediately, replace the EVAP purge outlet tube between the EVAP test port and 
EVAP canister. Repeat step 1 to verify the repair. Then go to next step. If pressure drops immediately, 
replace EVAP canister. Reconnect all components. Repeat step 1 to verify the repair. Then go to next 
step. 

5. Testing EVAP Fuel Vapor Vent Valve(s) Or Assembly 

 
Disconnect battery ground terminal. Connect leak tester to fuel filler pipe. Pressurize system to 14 in. 
H2O (3.48 kPa). If pressure drops immediately, reconnect all disconnect components. Perform 
evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . 
If pressure does not drop immediately, replace fuel vapor vent valve(s) or EVAP canister assembly. After 
repairs, 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.  

LS & Thunderbird 

 

2003 Ford Pickup F150 

2003 ENGINE PERFORMANCE System & Component Testing - Gasoline

  

1. Testing Fuel Tank Pressure Sensor - Connect Evaporative Emissions System Leak Tester (134-00056) 

to fuel filler pipe. Turn ignition on. 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 FTP V PID is not 4.22-4.90 volts, go to step 
3 . If FTP V PID is 4.22-4.90 volts, go to next step. 

2. Testing Venting Portion Of EVAP System For Blockage 

 
Using scan tool, open canister vent solenoid. If pressure drops immediately, 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 step 5 . 

3. Testing For Fuel Filler Pipe Blockage 

 
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 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. 

4. Testing Fuel Vapor Control Valve Tube For Pinch Or Blockage 

 
Reconnect fuel filler pipe to fuel tank. Lower fuel tank about 3/4" (19 mm). Connect EVAP tester to fuel 
filler pipe. Turn ignition on. 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 FTP V PID is 4.22-4.90 volts, go to step 2 . If 
FTP V PID is not 4.22-4.90 volts, fuel vapor control valve tube or fuel tank vapor control valve is 
blocked. Remove the fuel tank assembly. Remove the fuel vapor control tube from the tank and inspect it 
for any blockages or kinks. If the fuel vapor control tube is faulty, install a new one. If the vapor control 
tube is not restricted, install a new fuel tank 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. 

5. Isolate Location Of Blockage 

 
Disconnect fuel vapor control valve tube from 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, 
fuel vapor control valve tube or fuel tank vapor control valve is blocked. Remove the fuel tank assembly. 
Remove the vapor control tube from the tank and inspect it for any blockage or kinks. If the fuel vapor 
control tube is faulty, install a new one. If the fuel vapor control tube is not restricted, install a new fuel 
tank 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. 

 

2003 Ford Pickup F150 

2003 ENGINE PERFORMANCE System & Component Testing - Gasoline