Title: Inspect throttle body, air induction system, intake manifold and gaskets for vacuum leaks and/or unmetered air.
Course: Automotive Technology III (20104-III) > Section: ENGINE PERFORMANCE: Fuel, Air Induction, and Exhaust Systems

Procedures should include

- using a scan tool
- monitoring data and comparing results to service materials and manufacturer guidelines
- performing a propane test, if necessary.

Process/Skill Questions:

- What is unmetered air?
- How will unmetered air affect air-fuel (stoichiometric) ratio?
- How will a vacuum leak affect idle speed?