Intake-Air System Manifold Vacuum Inspection [L3]
WARNING: This page is about a different car, the 2004 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
- Verify that the intake air hoses are installed securely.
- Warm up the engine.
- Disconnect the vacuum hose connecting the intake manifold and the purge solenoid valve (purge solenoid valve side) and install the vacuum gauge. (See PURGE SOLENOID VALVE REMOVAL/INSTALLATION .)
- Measure the intake manifold vacuum while idling (no load) using the vacuum gauge.
- If not within the specification, perform the following inspections.
- Accelerator cable play
- Compression pressure (See COMPRESSION INSPECTION .)
- 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.
Standard
- ATX: -57.0 kPa {-428 mmHg, -16.9 inHg} or more
- MTX: -60.0 kPa {-451 mmHg, -17.8 inHg} or more
- If not within the specification, perform the following inspections.