Intake Manifold: Testing and Inspection

Intake Manifold Vacuum Inspection
1. Verity air intake hoses are installed properly.
2. Start the engine and run at idle.




3. Measure the intake manifold vacuum by using a vacuum gauge.

Specification
More than 60 kPa (450 mmHg, 16 in Hg)

4. If not as specified, inspect 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.