Intake Manifold Vacuum Inspection

Specification:

1. Verify that the intake-air hoses are installed properly.
2. Start the engine and run it at idle.
3. Measure the manifold vacuum using a vacuum gauge.
- If not as specified, inspect the 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.

Specification: More than 60 kPa {450 mmHg, 18 in.Hg}