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2. Secondary air injection - Wikipedia

   en.wikipedia.org/wiki/Secondary_air_injection

   The pump's air intake is filtered by a rotating screen or the vehicle air filter to exclude dirt particles large enough to damage the system. Air is delivered under light pressure to the injection point(s). A check valve prevents exhaust forcing its way back through the air injection system, which would damage the pump and other components.

3. Crankcase ventilation system - Wikipedia

   en.wikipedia.org/wiki/Crankcase_ventilation_system

   The PCV system was designed to re-circulate the gases into the air intake so that they could be combined with the fresh air/fuel and get more completely combusted. In 1961, California regulations required that all new cars be sold with a PCV system, therefore representing the first implementation of a vehicle emissions control device.

4. Idle air control actuator - Wikipedia

   en.wikipedia.org/wiki/Idle_air_control_actuator

   An idle air control actuator or idle air control valve (IAC actuator/valve) is a device commonly used in fuel-injected vehicles to control the engine's idling rotational speed . [1] In carburetted vehicles a similar device known as an idle speed control actuator is used.

5. Check valve - Wikipedia

   en.wikipedia.org/wiki/Check_valve

   Tilting-disc inconel check valve Check valve symbol on piping and instrumentation diagrams.The arrow shows the flow direction. Vertical lift check valve. A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction.

6. Ford CVH engine - Wikipedia

   en.wikipedia.org/wiki/Ford_CVH_engine

   Ford's Split Port Induction (SPI) system is a form of variable-length intake manifold. In this system, the intake path to each intake valve is split into primary and secondary passages. The primary passage contains the injector for the cylinder, and introduces the air tangentially to the cylinder for maximum swirl.

7. Ford Recalls 91K EcoBoost Models over Potential Engine Failure

   www.aol.com/ford-recalls-91k-ecoboost-models...

   The issue is faulty intake valves on 2.7- and 3.0-liter engines in 2021–2022 Ford F-150s, Broncos, Explorers, Edges, and the Lincoln Aviator and Nautilus too.