Intake Manifold Vacuum Inspection

1. Remove the check valve (intake-air system) and install the vacuum gauge. (See CHECK VALVE (EMISSION SYSTEM) REMOVAL/INSTALLATION [SKYACTIV-G 2.5T] .)
2. Verify that the intake air hoses are installed securely.
3. Warm up the engine.
4. 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 [SKYACTIV-G 2.5T] .)
     • Check valve (intake-air system) (See CHECK VALVE (INTAKE-AIR SYSTEM) REMOVAL/INSTALLATION [SKYACTIV-G 2.5T] .)
     • Check valve (intake manifold side) (See CHECK VALVE (EMISSION SYSTEM) REMOVAL/INSTALLATION [SKYACTIV-G 2.5T] .)
     • 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}