Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Intake Manifold Vacuum Inspection
2008 Mazda Tribute s Sport, 4WDSECTION Intake Manifold Vacuum Inspection
WARNING: This page is about a different car, the 2004 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
- Verify air intake hoses are installed properly.
- Start the engine and run it at idle.
- Disconnect the vacuum hose between the intake manifold and purge solenoid valve from the intake manifold side.
- Connect a vacuum gauge to the intake manifold and measure the intake manifold vacuum.
- If not as specified, inspect the following:
- Air suction at throttle body and intake manifold installation points
- Fuel injector insulator
- Engine compression
- If not as specified, inspect the following:
Specification
MT: -66.7-56.0 kPa {-500.24-420.1 mm Hg, -19.6-16.6 in Hg}
AT: -67.3-53.4kPa {-504.7-400.6 mm Hg, -19.8-15.8 in Hg}
NOTE:
- Air suction can be located by engine speed change when lubricant is sprayed on the area where suction is occurring.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.