Engine Vacuum Diagrams - 3.1L: Introduction

This article contains underhood views or schematics of vacuum hose routing. Use these vacuum diagrams as a guide during the visual inspection in BASIC TESTING - 3.1L article. This will assist in identifying improperly routed vacuum hoses which may cause driveability and/or computer-indicated malfunctions. ALWAYS verify vacuum hose routing in this article with underhood emission and vacuum label (if equipped) for specific applications.