V6. Where is idle air control valve? - 2003 Lincoln LS

SOURCE: 2002 LINCOLN LS V6 3.0 PCV VALVE LOCATION

it is down under the intake manifold. the intake manifold must be removed to get to it. this vehicle is known for developing a vacum leak in the elbow hose that connects to pcv valve, so ive done a few.

SOURCE: Locate the Idle Air Control Valve.

The IAC is at the back of the engine on the left side

Ronny Bennett Sr.

• 6988 Answers
• Posted on Jul 05, 2009

SOURCE: the idle air control valve

if it is not running,and wont start,pull the idle air control and look at it,,is it stuck all the way out? if so this is ur problem

SOURCE: what is the function of the idle speed control valve?

The idle air control (IAC) valve assembly on a combustible engine monitors and manipulates the amount of controlled air moving around the throttle plate. The IAC valve is managed by the electronic control module (ECM) of the engine, which calculates the position of the IAC valve. Voltage pulses called counts extend and retract an internal conical-tipped shaft called a pintle inside the IAC valve. When the pintle is extended, the cone-shaped tip positions itself closer to the air inlet and restricts the amount of air allowed to pass through the throttle, building up more air around the throttle plate to increase the rpms of the engine. When the pintle is retracted, it moves away from the inlet and allows more air into the throttle away from the throttle plate, decreasing the rpms. The IAC valve operates and adjusts constantly while the engine is running to help prevent the engine from stalling or surging. This will not cause the engine to misfire!! Hopefully this helps

SOURCE: 2001 LINCOLN LS V6 - ROUGH IDLE / SOMETIMES STALLING.

Very common problem is about a dime size hole wearing in the rubber elbow on the PCV valve located on the driver side rear of the intake manifold.