Intake Manifold Vacuum Inspection

WARNING: This page is about a different car, the 2004 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.

Verify air intake hoses are installed properly.
Start the engine and run it at idle.
Measure the manifold vacuum using a vacuum gauge.
- If not as specified, inspect following.
  - Air suction at throttle body, intake manifold and PCV valve installation points
  - Accelerator cable free play.
  - Fuel injector insulator.
  - Engine compression (See COMPRESSION INSPECTION .)
  Specification: More than 60 kPa {450 mmHg, 18 inHg}