Intake Manifold Vacuum Inspection

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
    (See COMPRESSION INSPECTION ).
Specification

MT: -66.7-56.0 kPa {-500-421 mmHg, -19.6-16.6 inHg}

AT: -66.9-53.1 kPa {-501-399 mmHg, -19.7-15.7 inHg}
NOTE:
- Air suction can be located by engine speed change when lubricant is sprayed on the area where suction is occurring.