Where is the Idle Air Control (IAC) valve on the OHV V6 engine?

It is component 5 in figure 1.3, shown near the top center of the engine adjacent to the throttle body (component 6).

What emission control components are identified in the engine compartment photo?

EGR vacuum solenoid, fuel pressure regulator, EGR backpressure sensor, EGR valve, IAC valve, throttle body/TPS, crankcase ventilation tube, IAT sensor, MAF sensor, air filter housing, battery, power distribution box, ignition coil pack, spark plugs and wires, and fuel injectors.

What other emission controls are part of the overall engine control system besides EEC-V sensors and actuators?

Positive crankcase ventilation (PCV), evaporative emission controls, secondary air injection, exhaust gas recirculation (EGR), and two catalytic converters.

What is the most common cause of emission and driveability problems according to this page?

A loose or broken vacuum hose or wire — the manual advises always checking hose and wiring connections first.

What information is on the VECI label?

Located in the engine compartment, the VECI label identifies the emission control devices on a particular engine and includes a vacuum hose routing diagram.

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Ford Taurus EEC-V Emission & Engine Control Component Locations - OHV V6

Service manual page with labeled engine-bay emission control component locations and prose

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Service manual page showing a numbered engine-bay photo of emission and engine-control component locations with explanatory text.

AI caption August 2007 · Photo 910 of 1028

This is a scanned page from a Haynes-style repair manual chapter covering emissions and engine control systems (EEC-V) for a Ford vehicle. The top of the page shows a photograph of an OHV V6 engine bay with 15 numbered callouts, and a legend identifying each component: EGR vacuum solenoid, fuel pressure regulator, EGR backpressure sensor, EGR valve, Idle Air Control (IAC) valve, throttle body/Throttle Position Sensor (TPS), crankcase ventilation tube, Intake Air Temperature (IAT) sensor, Mass Airflow (MAF) sensor, air filter housing, battery, power distribution box, ignition coil pack, spark plugs and wires, and fuel injectors. The text explains that the EEC-V system uses sensor inputs to command actuators such as the ignition coil, fuel injectors, and solenoids/relays, and lists other emission controls: PCV, evaporative emission controls, secondary air injection, EGR, and two catalytic converters. It advises home mechanics on the scope of DIY diagnosis, notes the Federal emissions warranty, and stresses checking vacuum hoses and wiring first when troubleshooting driveability problems. A smaller figure (1.7) shows the VECI label, which identifies a vehicle's emission control devices and includes a vacuum hose routing diagram, with a spark plug specification (AWSF-32PP) visible.

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Frequently asked questions

Where is the Idle Air Control (IAC) valve on the OHV V6 engine?: It is component 5 in figure 1.3, shown near the top center of the engine adjacent to the throttle body (component 6).
What emission control components are identified in the engine compartment photo?: EGR vacuum solenoid, fuel pressure regulator, EGR backpressure sensor, EGR valve, IAC valve, throttle body/TPS, crankcase ventilation tube, IAT sensor, MAF sensor, air filter housing, battery, power distribution box, ignition coil pack, spark plugs and wires, and fuel injectors.
What other emission controls are part of the overall engine control system besides EEC-V sensors and actuators?: Positive crankcase ventilation (PCV), evaporative emission controls, secondary air injection, exhaust gas recirculation (EGR), and two catalytic converters.
What is the most common cause of emission and driveability problems according to this page?: A loose or broken vacuum hose or wire — the manual advises always checking hose and wiring connections first.
What information is on the VECI label?: Located in the engine compartment, the VECI label identifies the emission control devices on a particular engine and includes a vacuum hose routing diagram.