INTAKE AIR SYSTEM MANIFOLD VACUUM INSPECTION[L3 Turbo]

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1.   Verify that the intake air hoses are installed securely.

2.  Warm up the engine.

3.  Disconnect the vacuum hose connected between the check valve and the intake manifold from the intake manifold and install the vacuum gauge. (See QUICK RELEASE CONNECTOR REMOVAL/INSTALLATION[L3 Turbo])

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[L3 Turbo].)

―  Air suction (installation areas of throttle body, fuel injector, PCV valve, intake manifold)

Note

•  If any air suction exists, the change in engine speed can be made apparent by spraying the penetrant lubricating spray on the applicable part.