Ford F6DZ-9D653-BA Reservoir Assembly

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First of all, the Evaporative Emission Control System (EECS) captures fuel vapor from the fuel tank, throttle body, and intake manifold. It consists of a charcoal-filled canister connected to the fuel tank, a ported vacuum, and an intake manifold vacuum. When the engine is off, the system holds fuel vapors in the canister. During engine operation, a purge control solenoid is opened to release the fuel vapors into the combustion process. A faulty purge control solenoid, damaged canister or hose problems can result to issues like poor idle, stalling or driveability problem. If necessary, the technician checks if there are any cracks in the canister and replaces it accordingly.

The Evaporative Emissions Control (EVAP) system is the system that is used to reduce the chance for fuel system emissions to evaporate and release unburned hydrocarbons into the atmosphere. During hot days, fumes in the fuel tank expand and when there is pressure build up, them is passed through the fuel vapor vent valve and the fuel vapor control valve to the EVAP canister where it is stored for some time until the engine can use it. The many elements of this system are installed underneath the vehicle; these are EVAP canister which is packed with activated charcoal, the check valve, dust separator and the canister vent solenoid. The fuel tank pressure sensor measures pressure inside the tank, and sends data to the PCM during leak tests. The fuel vapor vent valve regulates vapors that are to be admitted into the EVAP system while the fuel vapor control valve shuts off liquid fuel from entering the canister during fuelling. The canister vent solenoid is open most of the time and tests to seal the system and the EVAP check valve vents the air during refueling. The canister purge valve managed by the PCM controls the flow of the vapor into the intake manifold and its working is dependent on the manifold vacuum and the sensor. Some of the typical signs that indicate a defective-evaporative emission control system include foul smell of fuel, rough idle, and stalling, and in most cases, the hose connections and some of the components associated with the system are often checked for damages or leakage. To ensure that there is no increased fuel vapor pressure then the gas cap should be disconnected so that pressure can be heard to be escaping. Component replacement entails a step of disconnecting the battery and when replacing particular components, there is need to remove them and replace them with the right part and reconnection of the PCM for better performance.

When inspecting the charcoal canister, it is important to check for damage to the canister and the hoses at the top, as well as any signs of deterioration.

If necessary, components such as the canister may need to be replaced.

The possible causes of issues with the EVAP system could be an inoperative purge control solenoid, a damaged canister, or faulty hoses.

If excess pressure is detected, checks are conducted on hoses, the evaporative emission valve, and the charcoal canister's tightness.