Component Tests and General Diagnostics

MANIFOLD VACUUM CHECK
1. Before inspection, set the vehicle to the following condition.
- Engine coolant temperature: 80 - 95°C (176 - 203°F)
- Lights and all accessories: OFF
- Transmission: P range
2. Connect a tachometer.





3. Connect a three-way joint to the vacuum hose between the intake manifold plenum and the fuel-pressure regulator, and then connect a vacuum gauge.
4. Start the engine and check that the idle speed is within the standard value range. Take a reading of the vacuum gauge.
Minimum limit: 60 kPa (18 in Hg)