INTAKE MANIFOLD VACUUM INSPECTION [MZR 1.5, MZR 1.6]

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1. Remove the fresh-air duct and the air cleaner case as a single unit. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].)

2. Disconnect the evaporative hose connecting the intake manifold and the purge solenoid valve (purge solenoid valve side) and install the vacuum gauge.

3. Install the fresh-air duct and the air cleaner case as a single unit. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].)

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

5. Warm up the engine.

6. 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 [MZR 1.5, MZR 1.6].)

― Air suction

• Installation areas of each vacuum hose

• Installation area of throttle body

• Installation area of fuel injector

• Installation area of PCV valve

• Installation area of intake manifold

Standard

MZR 1.5: Approx. -63.0 kPa {-473 mmHg, -18.6 inHg}

MZR 1.6 (AT): Approx. -73.8 kPa {-554 mmHg, -21.8 inHg}

MZR 1.6 (MT): Approx. -72.6 kPa {-545 mmHg, -21.4 inHg}