Engine Mechanical Component Tests

INTAKE MANIFOLD VACUUM INSPECTION
1. Verify that the intake-air hoses are installed properly.




2. Disconnect the vacuum hose from the pressure regulator and connect to vacuum gauge as shown in the figure.
3. Start the engine and let it idle.
4. Measure the intake manifold vacuum by using the vacuum gauge.

Specification: 60.0-73.3 kPa (18-21 in.Hg)

5. If not as specified, inspect the following:
- Air suction.
- Throttle body.
- Intake manifold.
- PCV valve.
- Fuel injector insulator.
- Accelerator cable free play.
- Engine compression.
- Lysholm compressor.