Intake Manifold Vacuum Inspection

1. Verify 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: Less 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