Performance should include
- using a vacuum gauge
- comparing the vacuum gauge reading to the map tool data
- searching for a non-ported vacuum source
- performing an idle-vacuum test
- performing a cranking-vacuum test
- performing an exhaust-restriction test.
Process/Skill Questions:
- How does a vacuum gauge respond to a restricted exhaust system?
- What is a normal idle vacuum?
- What is a ported vacuum?