Engine Mechanical Component Tests

Intake Manifold Vacuum Inspection
1. Verify that the intake-air hoses are installed properly.
2. Start the engine and let it idle.
3. Measure the intake manifold vacuum by using a vacuum gauge.

Specification
More than 60 kPa {450 mmHg, 18 inHg}

4. If not as specified, check following.
- Air suction at:
Throttle body installation point
Intake manifold installation point
PCV valve installation point
- Fuel injector insulator
- Accelerator cable free play
- Engine compression

NOTE
- Air suction can be located by engine speed change when lubricant is sprayed on the area where suction is occurring.