Evaporative Emissions System -- E-Series Ford Econoline E250

SPECIFICATIONS

MATERIAL SPECIFICATIONS

TORQUE SPECIFICATIONS

Note. The vehicle vacuum routing diagrams are contained in the Description and Operation subsection of the Engine Emission Control information. Refer to ENGINE EMISSION CONTROL .

The Evaporative Emission (EVAP) system consists of the following components

1. EVAP canister vent solenoid and dust separator assembly (located on the front of the EVAP canister)
2. EVAP canister (located on top of the fuel tank for midship fuel tanks and on the LH frame rail for aft-of-axle fuel tanks)
3. EVAP canister bracket
4. EVAP canister purge valve (located on the intake manifold)
5. Fuel Tank Pressure (FTP) sensor (located on the Fuel Pump (FP) module)
6. Fuel vapor vent valve
7. Vapor hoses
8. Vapor tubes

The EVAP system

1. prevents hydrocarbon emissions from reaching the atmosphere.
2. stores fuel vapors in the EVAP canister that are generated during vehicle operation or hot soak, until they can be consumed by the engine during normal engine operation.
3. routes the stored fuel vapors to the engine during engine operation.
4. is controlled by the PCM which uses various sensor inputs to calculate the desired amount of EVAP purge flow. The PCM regulates the purge flow, induced by the application of intake manifold vacuum, by varying the duty cycle applied to the canister purge valve.

The fuel vapors are routed

1. from the fuel tank through the fuel vapor vent valves.
2. to the EVAP canister through a vapor line.
3. to the engine when the EVAP canister purge valve is opened by the PCM.

The FTP sensor

1. monitors the pressure levels in the fuel tank.
2. communicates the pressure reading to the PCM during the On-Board Diagnostic (OBD) II leak test.

The EVAP canister

1. contains activated carbon.
2. stores fuel vapors.

The fuel tank filler cap

1. relieves system vacuum below 3.5 kPa (15.09-in H 2 O).

The EVAP canister vent solenoid

1. is normally open.
2. seals the EVAP system for the OBD II leak and pressure tests.
3. is mounted to the EVAP canister.
4. is repaired as a separate item.

The EVAP canister purge valve

1. is normally closed.
2. regulates the purging of the EVAP canister.
3. is controlled by the PCM.

The engine ON EVAP leak-check monitor

1. is executed by the individual components of the enhanced EVAP system. Intake manifold vacuum is utilized to reach a target vacuum on the EVAP system. The FTP sensor is used by the engine ON EVAP leak-check monitor to determine if the target vacuum necessary to carry out the leak-check on the EVAP system has been reached. Once target vacuum on the EVAP system is achieved, the change in EVAP system vacuum over a calibrated period of time determines if a leak exists.

The Engine Off Natural Vacuum (EONV) EVAP leak-check monitor is executed

1. once the engine ON EVAP leak-check monitor is completed and the key is turned OFF. The EONVEVAP leak-check monitor determines if a leak is present when the naturally occurring change in the FTP or vacuum does not exceed a calibrated limit during a calibrated amount of time. A separate, low-power consuming microprocessor in the PCM manages the EONV leak-check. The engine OFF EVAP leak-check monitor is executed by the individual components of the enhanced EVAP system.

Scheme 118

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Scheme 120

Scheme 121

Refer to the INTRODUCTION - GASOLINE MODELS .

Evaporative Emission System Leak Test

SPECIAL TOOLS CHART VACUTEC Smoke Machine Fuel Evaporative Emission System Tester 218-0002 or equivalent Vehicle Communication Module (VCM) and Integrated Diagnostic System (IDS) software with appropriate hardware, or equivalent scan tool

Scheme 122

Scheme 123

Phase 1 - Leak Verification

1. Run the EVAP Test with the scan tool.
2. If the Evaporative Emission (EVAP) system failed the EVAP Test, then proceed to «PHASE 2»(/ford/econoline-e250/2012-2013/remont/testing-diagnostics/#evaporative-emissions-system-e-series__phase-2-system-leak-check) .

Phase 2 - System Leak Check

1. Disconnect the fuel vapor tube-to-EVAP canister purge valve quick connect coupling. For additional information, refer to «FUEL SYSTEM - GENERAL INFORMATION»(/ford/econoline-e250/2012-2013/remont/fuel-system/#fuel-system-general-information) .
2. Connect the VACUTEC Smoke Machine Fuel Evaporative Emission System Tester to the fuel vapor tube quick connect coupling. For additional information, manufacturer's instructions.
3. Connect the battery ground cable. For additional information, refer to «BATTERY, MOUNTING AND CABLES»(/ford/econoline-e250/2012-2013/remont/charging-system/#battery-battery-mounting-battery-cables) .
4. Open the EVAP canister purge valve with the scan tool.
5. Close the canister vent solenoid with the scan tool.
6. Carefully turn the fuel tank filler cap counterclockwise until the thread disengages and position aside.
7. Introduce smoke from the VACUTEC Smoke Machine Fuel Evaporative Emission System Tester into the EVAP system and verify that smoke is exiting the fuel tank filler pipe neck area. For additional information, manufacturer's instructions.
8. Install the fuel tank filler cap once smoke is observed exiting the fuel tank filler pipe neck area.
9. Continue to enter smoke into the system for 60 seconds to obtain pressure.
10. Press and release the remote start button in intervals of 15 seconds ON and 15 seconds OFF while checking for exiting smoke.
11. Use the halogen light provided with the VACUTEC Smoke Machine Fuel Evaporative Emission System Tester to follow the EVAP system path and look for smoke exiting at the source of the leak(s).
12. Repair any leaks as necessary.
13. Repeat the leak test until the system passes.

Aft-of-Axle Fuel Tank Evaporative Emission (EVAP) Canister Assembly Removal

Note. Vehicle body removed from art for clarity.

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Midship Fuel Tank Evaporative Emission (EVAP) Canister Assembly Removal

Note. Vehicle body removed from art for clarity.

Scheme 126

Scheme 127

Scheme 128

1. For additional information, refer to appropriate procedures in this information .

Removal and Installation

1. Remove the midship fuel tank. For additional information, refer to «FUEL TANK AND LINES»(/ford/econoline-e250/2012-2013/remont/fuel-system/#fuel-tank-fuel-lines) .
2. Disconnect the fuel tank-to-Evaporative Emission (EVAP) canister vapor hose quick connect coupling. For additional information, refer to «FUEL SYSTEM - GENERAL INFORMATION»(/ford/econoline-e250/2012-2013/remont/fuel-system/#fuel-system-general-information) .
3. Remove the 4 nuts and the EVAP canister. To install, tighten to 9 Nm (80 lb-in).
4. To install, reverse the removal procedure.

Evaporative Emission Canister - Aft-of-Axle

MATERIAL SPECIFICATIONS

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to «JACKING & LIFTING»(/ford/econoline-e250/2012-2013/remont/hoistjack/#jacking-lifting) .
2. Disconnect the battery ground cable. For additional information, refer to «BATTERY, MOUNTING AND CABLES»(/ford/econoline-e250/2012-2013/remont/charging-system/#battery-battery-mounting-battery-cables) .
3. Disconnect the 2 fuel vapor tubes-to-Evaporative Emission (EVAP) canister quick connect couplings and fuel vapor tube pushpin retainer. For additional information, refer to «FUEL SYSTEM - GENERAL INFORMATION»(/ford/econoline-e250/2012-2013/remont/fuel-system/#fuel-system-general-information) .
4. Disconnect the EVAP canister vent solenoid electrical connector.
5. Remove the 5 EVAP canister assembly bracket-to-frame bolts. To install, tighten to 18 Nm (159 lb-in).
6. Place the EVAP canister assembly on a clean workbench.
7. If necessary, remove the 4 EVAP canister-to-bracket bolts. To install, tighten the 2 lower bolts to 6 Nm (53 lb-in). To install, tighten the 2 upper bolts to 10 Nm (89 lb-in).
8. If necessary, separate the EVAP canister vent solenoid and dust separator assembly from the EVAP canister.
9. To install, reverse the removal procedure. Carry out the Evaporative Emission System Leak Test. For additional information, refer to «EVAPORATIVE EMISSION SYSTEM LEAK TEST»(/ford/econoline-e250/2012-2013/remont/testing-diagnostics/#evaporative-emissions-system-e-series__evaporative-emission-system-leak-test) .

Evaporative Emission Canister Purge Valve

Note. Vehicle body removed from art for clarity.

Note. 5.4L shown in illustration, 4.6L and 6.8L similar.

Scheme 129

1. Disconnect the battery ground cable. For additional information refer to «BATTERY, MOUNTING AND CABLES»(/ford/econoline-e250/2012-2013/remont/charging-system/#battery-battery-mounting-battery-cables) .
2. Remove the engine cover. For additional information, refer to «INTERIOR TRIM AND ORNAMENTATION»(/ford/econoline-e250/2012-2013/remont/exteriorinterior-trim/#interior-trim-and-ornamentation) .
3. Disconnect the Evaporative Emission (EVAP) canister purge valve and hose electrical connector.
4. Disconnect the EVAP canister purge valve and hose assembly-to-intake manifold quick connect coupling. For additional information, refer to «FUEL SYSTEM - GENERAL INFORMATION»(/ford/econoline-e250/2012-2013/remont/fuel-system/#fuel-system-general-information) .
5. Disconnect the fuel vapor tube to-EVAP canister purge valve and hose assembly quick connect coupling. For additional information, refer to «FUEL SYSTEM - GENERAL INFORMATION»(/ford/econoline-e250/2012-2013/remont/fuel-system/#fuel-system-general-information) .
6. Slide the EVAP canister purge valve and hose assembly off the bracket.
7. To install, reverse the removal procedure. Carry out the Evaporative Emission System Leak Test. For additional information, refer to «EVAPORATIVE EMISSION SYSTEM LEAK TEST»(/ford/econoline-e250/2012-2013/remont/testing-diagnostics/#evaporative-emissions-system-e-series__evaporative-emission-system-leak-test) .

Fuel Vapor Vent Valve

Note. Midship tank shown in illustration, aft-of-axle similar.

Scheme 130

1. Remove the fuel tank. For additional information, refer to «FUEL TANK AND LINES»(/ford/econoline-e250/2012-2013/remont/fuel-system/#fuel-tank-fuel-lines) .
2. Press down and rotate the fuel vapor vent valves counterclockwise and remove from the fuel tank.
3. To install, reverse the removal procedure. Carry out the Evaporative Emission System Leak Test. For additional information, refer to «EVAPORATIVE EMISSION SYSTEM LEAK TEST»(/ford/econoline-e250/2012-2013/remont/testing-diagnostics/#evaporative-emissions-system-e-series__evaporative-emission-system-leak-test) .

1. Refer to «EVAPORATIVE EMISSION CANISTER - MIDSHIP»(/ford/econoline-e250/2012-2013/remont/testing-diagnostics/#evaporative-emissions-system-e-series) or «EVAPORATIVE EMISSION CANISTER - AFT-OF-AXLE»(/ford/econoline-e250/2012-2013/remont/testing-diagnostics/#evaporative-emissions-system-e-series__evaporative-emission-canister-aft-of-axle) .

1. Refer to «EVAPORATIVE EMISSION CANISTER - MIDSHIP»(/ford/econoline-e250/2012-2013/remont/testing-diagnostics/#evaporative-emissions-system-e-series) or «EVAPORATIVE EMISSION CANISTER - AFT-OF-AXLE»(/ford/econoline-e250/2012-2013/remont/testing-diagnostics/#evaporative-emissions-system-e-series__evaporative-emission-canister-aft-of-axle) .

See also:
• ENGINE EMISSION CONTROL
• INTRODUCTION - GASOLINE MODELS
• FUEL SYSTEM - GENERAL INFORMATION
• BATTERY, MOUNTING AND CABLES
• FUEL TANK AND LINES
• JACKING & LIFTING
• INTERIOR TRIM AND ORNAMENTATION
• PHASE 2
• EVAPORATIVE EMISSION SYSTEM LEAK TEST
• EVAPORATIVE EMISSION CANISTER - MIDSHIP
• EVAPORATIVE EMISSION CANISTER - AFT-OF-AXLE