Intake Manifold Vacuum Inspection: Notes

Verify air intake hoses are installed properly.
Start the engine and run at idle.
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.