Intake Manifold Vacuum Inspection

Remove the check valve (intake-air system) and install the vacuum gauge. (See CHECK VALVE (EMISSION SYSTEM) REMOVAL/INSTALLATION .)
Verify that the intake air hoses are installed securely.
Warm up the engine.
Measure the intake manifold vacuum while idling (no load) using the vacuum gauge.
- If not within the specification, perform the following inspections.
  - Compression pressure (See COMPRESSION INSPECTION .)
  - Check valve (intake-air system) (See CHECK VALVE (INTAKE-AIR SYSTEM) REMOVAL/INSTALLATION .)
  - Check valve (intake manifold side) (See CHECK VALVE (EMISSION SYSTEM) REMOVAL/INSTALLATION .)
  - Air suction
- Installation areas of each vacuum hose
- Installation area of dynamic pressure turbo
- Installation area of water-cooled charge air cooler
- Installation area of throttle body
- Installation area of fuel injector
- Installation area of PCV valve
- Installation area of intake manifold
  Standard
  
  Approx. -60.0 kPa {-450.0 mmHg, -17.7 inHg}