Engine Mechanical Component Tests

1. Verify that the intake-air hoses are installed properly.
2. Start the engine and let it idle.
3. Measure the intake manifold vacuum by using a vacuum gauge.

Specification: More than 60 kPa {450 mmHg, 18 in.Hg}

4. If not as specified, check following.
- Air suction at: Throttle body installation point Intake manifold installation point. PCV valve installation point
- Fuel injector insulator
- Accelerator cable free play
- Engine compression.

NOTE: Air suction can be located by engine speed change when lubricant is sprayed on the area where suction is occurring.