Mazda RX-8 Workshop Manual page 963

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2011 - RX-8 - Engine
INTAKE MANIFOLD VACUUM INSPECTION [13B-MSP]
1. Verify that the intake-air system related parts and hoses are securely installed.
2. Disconnect the vacuum hose shown in the figure.
3. Install the vacuum gauge.
4. Warm up the engine.
5. Measure intake manifold vacuum while no load and Idling.
If not within the specification, perform the following inspection:
Compression pressure (See COMPRESSION INSPECTION [13B-