What vacuum diagram is shown here?

The vacuum routing for the 3.8L and 3.8L Supercharged engines, showing vacuum distribution blocks, vacuum reservoir, brake booster, PCV, EVAP canister and purge solenoid, EVR solenoid, IAC valve, and supercharger boost gauge lines.

Which components are supercharged-only in this diagram?

The instrument cluster vacuum boost gauge, connected via a black hose to the supercharger and cooler assembly, is labeled 'SUPERCHARGED ONLY'.

What connector and wires serve the EGR Vacuum Regulator (EVR) solenoid?

Connector C165, with circuits 361 R (red) and 360 BR/PK (brown/pink), going to the Electronic Engine Control (page 23-3).

How is the EVAP canister purge solenoid wired?

Through connector C164 with circuits GY/Y 101 and 361 R to the Electronic Engine Control, referenced to page 23-1. The EVAP canister also has a vacuum line routed to the fuel tank.

What wiring goes to the Idle Air Control (IAC) valve?

Connector C179 with circuits 361 R and 264 W/LB from the Electronic Engine Control (page 23-3).

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Ford 3.8L & 3.8L Supercharged Vacuum Routing Diagram - Thunderbird/Cougar

Vacuum routing diagram for 3.8L and 3.8L Supercharged engine with distribution block and reservoir

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Vacuum hose routing diagram for the 3.8L and 3.8L Supercharged engine showing distribution block, reservoir, brake booster, and EVAP canister.

AI caption July 2008 · Photo 25 of 86

This document is a vacuum routing diagram for the Ford 3.8L and 3.8L Supercharged V6 engines, as used in Thunderbird/Cougar applications. It illustrates the vacuum hose layout from two vacuum distribution blocks and the intake manifold fittings to major vacuum-operated components: the vacuum reservoir, vacuum brake booster, air conditioner/heater or Semi-Automatic Temperature Control (SATC) system, speed control, PCV valve, EVAP canister and EVAP canister purge solenoid (with a line to the fuel tank), EGR Vacuum Regulator (EVR) solenoid, and Idle Air Control (IAC) valve. Supercharged-only items include the instrument cluster vacuum boost gauge (black hose) connected to the supercharger and cooler assembly. Electrical connections to the Electronic Engine Control are shown with connector numbers and wire circuits: C165 (361 R, 360 BR/PK) for the EVR solenoid, C179 (361 R, 264 W/LB) for the IAC valve, and C164 (GY/Y 101 and 361 R) for the EVAP purge solenoid, with cross-references to EEC pages 23-1 and 23-3, plus references to speed control (page 31-3), A/C-heater (page 54-1), and SATC (page 55-5). Readers can trace vacuum sources and identify which hoses feed each emissions and accessory component.

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Frequently asked questions

What vacuum diagram is shown here?: The vacuum routing for the 3.8L and 3.8L Supercharged engines, showing vacuum distribution blocks, vacuum reservoir, brake booster, PCV, EVAP canister and purge solenoid, EVR solenoid, IAC valve, and supercharger boost gauge lines.
Which components are supercharged-only in this diagram?: The instrument cluster vacuum boost gauge, connected via a black hose to the supercharger and cooler assembly, is labeled 'SUPERCHARGED ONLY'.
What connector and wires serve the EGR Vacuum Regulator (EVR) solenoid?: Connector C165, with circuits 361 R (red) and 360 BR/PK (brown/pink), going to the Electronic Engine Control (page 23-3).
How is the EVAP canister purge solenoid wired?: Through connector C164 with circuits GY/Y 101 and 361 R to the Electronic Engine Control, referenced to page 23-1. The EVAP canister also has a vacuum line routed to the fuel tank.
What wiring goes to the Idle Air Control (IAC) valve?: Connector C179 with circuits 361 R and 264 W/LB from the Electronic Engine Control (page 23-3).