Engine Mechanical Component Tests

Intake Manifold Vacuum Inspection
1. Verify that the intake-air system hoses are fitted securely.
2. Disconnect the vacuum hose from the pressure regulator and connect to vacuum gauge as shown.
3. Start the engine and let it idle.
4. Measure the intake manifold vacuum by using a vacuum gauge.

Vacuum: More than 60 kPa (18 in.Hg)

5. If not as specified, check following
a. Air suction at:
- Throttle body installation point
- Intake manifold installation point
- PCV valve installation point

b. Accelerator cable free play
c. Engine compression