AutoZone 2011 BMW 550I 4.4L Twin Turbo DOHC 8cyl | Repair Guides | Engine Performance & Emission Controls | Components & Systems | Evaporative Emission Control System | AutoZone.com

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    Mustang 2009-2010

    Evaporative Emission Control System

    Print

    EVAP Canister



    Operation

    Specific to:

    Ford Mustang 2009-2010

    The Evaporative Emissions (EVAP) Canister is the primary component in the Evaporative Emission (EVAP) Control System that prevents the evaporation of unburned fuel vapors (Hydrocarbons) from being released into the atmosphere. The EVAP canister contains a charcoal element for the filtering of hydrocarbons, and the filtered Carbon Dioxide (CO2) is then vented to atmosphere when the vehicle is not in operation. The canister also contains a number of ports, which provide for the redistribution of hydrocarbons into the fuel tank when the vehicle is in operation through the purge control system.

    Removal & Installation

    Specific to:

    Ford Mustang 2009-2010


    WARNING
    Do not smoke, carry lighted tobacco or have an open flame of any type when working on or near any fuel-related component. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions may result in serious personal injury.


    WARNING
    Do not carry personal electronic devices such as cell phones, pagers or audio equipment of any type when working on or near any fuel-related component. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions may result in serious personal injury.


    WARNING
    Always disconnect the battery ground cable at the battery when working on an evaporative emission (EVAP) system or fuel-related component. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions may result in serious personal injury.

    1. With the vehicle in NEUTRAL, position it on a hoist.
    2.  
    3. Disconnect the battery ground cable.
      NOTE
      Clean the Evaporative Emission (EVAP) canister electrical connector and the immediate surrounding area of any dirt or foreign material.

    4.  
    5. Disconnect the EVAP canister electrical connector.
    6.  
    7. Release the 2 fuel tube bundle assembly retainer clips from the EVAP canister assembly.
    8.  
    9. Disconnect the fuel vapor tube assembly-to- EVAP canister tank tube quick connect coupling.
    10.  
    11. Disconnect the EVAP canister assembly purge tube-to-vapor tube quick connect coupling.
    12.  
    13. Release the EVAP canister assembly vapor tube retainer clip.
    14.  
    15. Release the fuel vapor tube assembly retainer clip.
    16.  
    17. Disconnect the fuel vapor tube-to- EVAP canister assembly vapor tube quick connect coupling
    18.  
    19. Remove the 2 EVAP canister assembly nuts. To install, tighten to 89 inch lbs. (10 Nm).
    20.  
    21. Remove the 2 EVAP canister assembly bolts. To install, tighten to 106 inch lbs. (12 Nm).
    22.  
    23. Remove the EVAP canister assembly.

      Click image to see an enlarged view

      Fig. Removing and installing the EVAP canister

    24.  

    To install:

    1. To install, reverse the removal procedure. Carry out the Evaporative Emission System Leak Test.
    2.  

    Testing
    Evaporative Emission Control System (EVAP) Diagnostics

    Specific to:

    Ford Mustang 2009-2010

    When testing the EVAP system for proper operation, there should always be a pressure differential between the fuel tank pressure and atmospheric pressure. If any of the tests reveal a pressure differential of less than .02- Hg (.067 kPa/.5mm Hg), the Powertrain Control Module (PCM) will interpret this condition as a leak.

    1. Verify the condition of the EVAP system by performing the following visual inspections:

      Ensure that the fuel filler cap is installed and properly secured.
       
      Inspect the charcoal canister for physical damage such as cracks, broken or cracked fittings, damage from road debris, or rodent damage.
       
      Inspect all EVAP control devices (EVAP and purge control system monitors, controllers, and actuators) for physical damage such as cracks, broken or cracked fittings, damage from road debris, or rodent damage.
       
      Inspect all hoses and vacuum line connections for proper routing and placement.
       
      Inspect all electronic control devices for proper electrical connections.
       
      Inspect the condition of all fittings and seals for damage, drying, or wear.
       
      Inspect the condition of all hoses and vacuum lines for displacement, damage, or wear.
       

    2.  

    If any physical defects are evident, verify the operation of any questionable components before replacement.

    1. Verify the operation of the EVAP system by performing any or all the following tests:

      Using a suitable scan tool, perform an actuator (active) test to verify the correct operation of EVAP control devices (EVAP and purge control system monitors, controllers, and actuators).
       
      Using a smoke machine, verify that the EVAP system does not exhibit any physical leaks.
       
      Using a suitable EVAP system pressure tester, verify that the EVAP system is properly sealed against positive and negative pressure.
       
      Using a suitable EVAP system pressure tester along with a suitable scan tool, monitor the EVAP pressure under positive and negative pressure conditions.
       

    2.  

    Related Diagnostic Trouble Codes (DTC)

    Specific to:

    Ford Mustang 2009-2010



    Click image to see an enlarged view

    Fig. Related Diagnostic Trouble Codes

    EVAP Purge Control Valve



    Operation

    Specific to:

    Ford Mustang 2009-2010

    The Evaporative Emissions (EVAP) Control System prevents the evaporation of unburned fuel vapors (Hydrocarbons) from being released into the atmosphere. The Evaporative Emissions (EVAP) Canister contains a charcoal element for the filtering of hydrocarbons, and the filtered Carbon Dioxide (CO2) is then vented to atmosphere when the vehicle is not in operation.

    When the vehicle is in operation, the Evaporative Emissions (EVAP) Purge Control Valve draws the unburned fuel vapors back into the fuel tank so that the hydrocarbons can be condensed, and redistributed to the engine for correct burning.

    Removal & Installation

    Specific to:

    Ford Mustang 2009-2010


    WARNING
    Do not smoke, carry lighted tobacco or have an open flame of any type when working on or near any fuel-related component. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions may result in serious personal injury.


    WARNING
    Do not carry personal electronic devices such as cell phones, pagers or audio equipment of any type when working on or near any fuel-related component. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions may result in serious personal injury.


    WARNING
    Always disconnect the battery ground cable at the battery when working on an evaporative emission (EVAP) system or fuel-related component. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions may result in serious personal injury.

    1. Disconnect the battery ground cable.
    2.  
    3. Disconnect the Evaporative Emission (EVAP) canister purge valve electrical connector.
      NOTE
      The upper vapor tube has an identification tag attached on the end of tube near the quick connect coupling. If this vapor tube is removed or replaced make sure that the end with the identification tag is reconnected to the upper EVAP canister purge valve port.

    4.  
    5. Disconnect the 2 vapor tube-to- EVAP canister purge valve quick connect couplings.
    6.  
    7. Depress the release tab and remove the EVAP canister purge valve from the mounting bracket.

      Click image to see an enlarged view

      Fig. Removing and installing the EVAP canister purge valve

    8.  

    To install:

    1. To install, reverse the removal procedure. Carry out the Evaporative Emission System Leak Test.
    2.  

    Testing
    Connection & Wiring Diagnosis

    Specific to:

    Ford Mustang 2009-2010

    Refer to the Electrical Wiring Diagram for component and connector locations, connector views, and circuit-specific information.

    Many intermittent open or short circuits may be caused by wiring harness and connector movement due to vibration, engine torque, bumps and rough pavement, etc.

    1. Test the wiring harness and connectors by performing the following tests:

      Move the related connectors and wiring while monitoring the appropriate scan tool data.
       
      Move the related connectors and wiring with the component commanded ON and OFF. Using a suitable the scan tool, observe the component operation.
       
      With the engine running, move the related connectors and wiring while monitoring component operation.
       
      If harness or connector movement affects the data displayed, the component and system operation, or the engine operation, inspect and repair the harness or connections as necessary.
       

    2.  
    3. Test the connector terminal pins and/or wiring by performing the following tests:

      Inspect for incorrect mating of the connector halves, or terminals not fully seated in the connector body.
       
      Inspect for improperly formed or damaged terminals and test for incorrect terminal tension.
       
      Inspect for poor terminal to wire connections including terminals crimped over insulation. This requires removing the terminal from the connector body.
       
      Inspect for corrosion or water intrusion. Pierced or damaged insulation can allow moisture to enter the wiring. The conductor can corrode inside the insulation with little visible evidence. Look for swollen and/or brittle sections of wire in the suspect circuits.
       
      Inspect for wires that are broken inside the insulation by gently pulling on suspect sections of wiring.
       

    4.  

    Evaporative Emission Control System (EVAP) Diagnostics

    Specific to:

    Ford Mustang 2009-2010

    When testing the EVAP system for proper operation, there should always be a pressure differential between the fuel tank pressure and atmospheric pressure. If any of the tests reveal a pressure differential of less than .02- Hg (.067 kPa/.5mm Hg), the Powertrain Control Module (PCM) will interpret this condition as a leak.

    1. Verify the condition of the EVAP system by performing the following visual inspections:

      Ensure that the fuel filler cap is installed and properly secured.
       
      Inspect the charcoal canister for physical damage such as cracks, broken or cracked fittings, damage from road debris, or rodent damage.
       
      Inspect all EVAP control devices (EVAP and purge control system monitors, controllers, and actuators) for physical damage such as cracks, broken or cracked fittings, damage from road debris, or rodent damage.
       
      Inspect all hoses and vacuum line connections for proper routing and placement.
       
      Inspect all electronic control devices for proper electrical connections.
       
      Inspect the condition of all fittings and seals for damage, drying, or wear.
       
      Inspect the condition of all hoses and vacuum lines for displacement, damage, or wear.
       

    2.  

    If any physical defects are evident, verify the operation of any questionable components before replacement.

    1. Verify the operation of the EVAP system by performing any or all the following tests:

      Using a suitable scan tool, perform an actuator (active) test to verify the correct operation of EVAP control devices (EVAP and purge control system monitors, controllers, and actuators).
       
      Using a smoke machine, verify that the EVAP system does not exhibit any physical leaks.
       
      Using a suitable EVAP system pressure tester, verify that the EVAP system is properly sealed against positive and negative pressure.
       
      Using a suitable EVAP system pressure tester along with a suitable scan tool, monitor the EVAP pressure under positive and negative pressure conditions.
       

    2.  

    Related Diagnostic Trouble Codes (DTC)

    Specific to:

    Ford Mustang 2009-2010



    Click image to see an enlarged view

    Fig. Related Diagnostic Trouble Codes

     
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