Component Tests and General Diagnostics

ENGINE CONTROL SYSTEM OPERATION INSPECTION

Intake Manifold Vacuum Inspection
1. Verify air intake hoses are installed properly.
2. Start the engine and run at idle.




3. Measure the manifold vacuum using a vacuum gauge.
- If not as specified, inspect the following.
- Air suction at:
TB installation point
Intake manifold installation point
PCV valve installation point
- Fuel injector insulator
- Accelerator cable free play
- Engine compression (See COMPRESSION INSPECTION.)

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

Specification: More than 60 kPa {450 mmHg, 18 inHg}