Vehicle applicability: This diagnostic supplement covers multiple Ford vehicles and engines. Follow the application named in the source below. Some references apply to vehicles other than Mustang.
1-24 Description and Operation
Engine Control Components
Typical EVAP Ejector
Item | Part Number | Description |
|---|---|---|
1 | — | EVAP Ejector |
Evaporative Emission (EVAP) Purge Valve
The EVAP purge valve (located near the engine) is part of the enhanced EVAP system controlled by the PCM. This valve controls the flow of vapors (purging) from the EVAP canister to the intake manifold during various engine operating modes. The EVAP purge valve is a normally closed valve. The PCM outputs a duty cycle between 0% and 100% to control the EVAP purge valve.
Typical EVAP Purge Valve
Item | Part Number | Description |
|---|---|---|
1 | — | Fuel Vapor To EVAP Canister |
2 | — | Fuel Vapor To Intake Manifold |
Evaporative Emission (EVAP) Vapor Blocking Valve
The EVAP vapor blocking valve is a normally open valve, electrically closed by the PCM, to isolate the fuel tank from the rest of the EVAP system. This prevents the canister from becoming saturated causing hydrocarbons (HC) to be released into the atmosphere in a situation where the engine is OFF, and the ignition is ON during a drive cycle. The EVAP vapor blocking valve will automatically open to relieve excess pressure or vacuum, in the fuel tank, if the pressure or vacuum reaches a maximum calibrated value. The EVAP vapor blocking valve is located near the EVAP canister.
2016 Powertrain Control/Emissions Diagnosis, Gasoline Engines, 3/2015
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.