Initial Inspection and Diagnostic Overview

Vacuum Gauge Installation:

1. The vehicle should be prepared as follows before proceeding.

^ Engine coolant temperature: 80 - 95°C (176 - 205°F)
^ Lights, electric cooling fan, and accessories: OFF
^ Transaxle: Neutral (Park for A/T)

2. Connect a tachometer.
3. Install a three-way joint to the vacuum hose connected between the air intake plenum and the fuel pressure regulator and connect a vacuum gauge to the joint.
4. Start the engine and check that idle speed is within the standard value range.
5. Check the manifold vacuum.

Limit: 450 mmHg (18 in.Hg) min.