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Engine Vacuum Diagrams: Introduction

This article contains underhood views or schematics of vacuum hose routing. Use these vacuum diagrams as a guide during the visual inspection in appropriate BASIC DIAGNOSTIC PROCEDURES article. This will assist in identifying improperly routed vacuum hoses which may cause driveability and/or computer-indicated malfunctions. Always verify vacuum hose routing using underhood emission and vacuum label (if equipped) for specific applications.

NOTE: If underhood vacuum label and diagram in manual differ, underhood label should always take precedent, unless it is suspected of not being correct application.
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