Ford F75Z-9D653-AC Reservoir Assembly

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The fuel vapors from the throttle body, intake manifold and fuel tank are captured and stored on the EVAP. These vapors are then conveyed by a charcoal canister into the combustion chamber while engine is in progress. So far, it has gone from a system with an activated carbon canister to one that is electronically controlled including other parts of its composition. The inspections vary with the presence of loose or damaged components, smell of gasoline, or leakage of fuel. An increase in fuel pressure is checked by either removing the gas cap or using a SCAN tool. In case where there is increased pressure, tests are conducted on hoses, evaporative emission valve, and charcoal canister. Also, inspections include smelling for fuel vapor in the engine compartment as well as checking hoses and VMV voltage.

The Evaporative Emission Control System (EVAP) stores fuel vapors from the fuel tank and intake manifold in a charcoal-filled canister, and directs them into the combustion chamber during engine operation. The system includes the canister, fuel vapor management valve, fuel tank pressure sensor, fuel filler cap, fuel vapor valve, and vacuum lines. Issues with the EVAP system can cause poor idle, stalling, and fuel odor. Excess pressure in the fuel tank, fuel vapor odor, or faulty components can be diagnosed by removing the gas cap, using a diagnostic tool, or inspecting the canister, hoses, and valves. When replacing components, label and detach vacuum lines, and remove the canister by loosening the clamp bolt. Installation is the reverse of removal.

The fuel vapors from the throttle body, intake manifold and fuel tank are captured and stored on the EVAP. These vapors are then conveyed by a charcoal canister into the combustion chamber while engine is in progress. So far, it has gone from a system with an activated carbon canister to one that is electronically controlled including other parts of its composition. The inspections vary with the presence of loose or damaged components, smell of gasoline, or leakage of fuel. An increase in fuel pressure is checked by either removing the gas cap or using a SCAN tool. In case where there is increased pressure, tests are conducted on hoses, evaporative emission valve, and charcoal canister. Also, inspections include smelling for fuel vapor in the engine compartment as well as checking hoses and VMV voltage.

When the engine is running, the fuel vapors are purged from the canister by a vapor management valve (VMV), which is PCM controlled and consumed in the normal combustion process.

The EVAP canister temporarily stores the fuel vapors.

Some common symptoms of EVAP issues include fuel odors and poor engine performance.

If excess pressure is detected, the canister, hoses, and evaporative emission valve should be inspected.