Identify emission control system components and configurations.

Identification should include

• positive crankcase ventilation system
  • PCV valve
  • electric PCV valve
• evaporative emission control system
  • fuel tank cap
  • charcoal canister
  • purge line
  • purge valve
  • liquid-vapor separator
  • rollover valve
• exhaust gas recirculation system
  • EGR valve
  • electronic EGR valve
  • electronic vacuum EGR valve.

Process/Skill Questions:

• What is the purpose of emissions control systems?
• What kind of emission control system do most late model vehicles use? Why?
• Where is the charcoal canister located?
• What are the penalties for rendering inoperative any emissions control component?
• What federal agency oversees emissions standards?