Intake Manifold Vacuum Inspection

1. Verify air intake 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 following:
     • Air suction at throttle body, intake manifold and PCV valve installation points
     • EGR valve (struck open)
     • Fuel injector insulator
     • Engine compression (See COMPRESSION INSPECTION .)

Specification 

More than 60 kPa {450 mmHg, 18 inHg}