Ford F75Z-9D653-AC Reservoir Assembly

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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 Evaporative Emission Control System (EVAP) is designed to capture and store fuel vapors emanating from the fuel tank, throttle body, and intake manifold during non-operation or idle. The system utilizes a charcoal canister to store the vapors, subsequently directing them into the combustion chamber for burning during engine operation. In early models, the EVAP system included a charcoal-filled canister, canister purge valve, and associated lines. With the advent of OBD-II systems in later models, the EVAP system became electronically controlled, featuring a charcoal-filled canister, fuel vapor management valve (VMV), fuel tank pressure sensor, fuel filler cap, fuel vapor valve, and vacuum connections. The system's electronic control allows the detection of various EVAP system issues in 1995 and later models, leading to trouble codes for specific problem areas. System checks involve inspecting for loose or damaged components, fuel odors, and fuel leakage, with particular attention to hoses and canister integrity. Excessive pressure in the fuel tank is assessed by removing the gas cap and listening for pressure release or using a SCAN tool for a more accurate diagnosis. If excess pressure is detected, checks are conducted on hoses, the evaporative emission valve, and the charcoal canister's tightness. Finally, for fuel vapor odor in the engine compartment, inspections are carried out on hoses around the VMV, checking VMV voltage, and conducting further diagnostics with a SCAN tool if necessary. Component replacement involves labeling and detaching vacuum lines, loosening the canister mounting clamp bolt, removing the canister, and then reinstalling it in reverse order.

This system is designed to trap and store fuel vapors that evaporate from the fuel tank, throttle body, and intake manifold during non-operation or idling. The fuel vapors are stored in a charcoal-filled canister and then routed into the combustion chamber to be burned during engine operation. The Evaporative Emission Control System (EVAP) consists of the canister, fuel vapor management valve (VMV), fuel tank pressure sensor, fuel filler cap, fuel vapor valve, and vacuum lines. The system can detect various EVAP system problems and set trouble codes. Poor idle, stalling, and fuel odor can be caused by a malfunctioning VMV, damaged canister, or faulty hoses. Excessive pressure in the fuel tank can be checked by removing the gas cap or using a diagnostic tool. If excess pressure is detected, the canister, hoses, and evaporative emission valve should be inspected. Fuel vapor odor in the engine compartment can be caused by damaged or incorrectly routed hoses or a faulty VMV. When replacing components, vacuum lines should be labeled and detached, and the canister can be removed by loosening the mounting clamp bolt.

The Evaporative Emission Control System (EVAP) is designed to capture and store fuel vapors emanating from the fuel tank, throttle body, and intake manifold during non-operation or idle. The system utilizes a charcoal canister to store the vapors, subsequently directing them into the combustion chamber for burning during engine operation. In early models, the EVAP system included a charcoal-filled canister, canister purge valve, and associated lines. With the advent of OBD-II systems in later models, the EVAP system became electronically controlled, featuring a charcoal-filled canister, fuel vapor management valve (VMV), fuel tank pressure sensor, fuel filler cap, fuel vapor valve, and vacuum connections. The system's electronic control allows the detection of various EVAP system issues in 1995 and later models, leading to trouble codes for specific problem areas. System checks involve inspecting for loose or damaged components, fuel odors, and fuel leakage, with particular attention to hoses and canister integrity. Excessive pressure in the fuel tank is assessed by removing the gas cap and listening for pressure release or using a SCAN tool for a more accurate diagnosis. If excess pressure is detected, checks are conducted on hoses, the evaporative emission valve, and the charcoal canister's tightness. Finally, for fuel vapor odor in the engine compartment, inspections are carried out on hoses around the VMV, checking VMV voltage, and conducting further diagnostics with a SCAN tool if necessary. Component replacement involves labeling and detaching vacuum lines, loosening the canister mounting clamp bolt, removing the canister, and then reinstalling it in reverse order.

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.