Exhaust Gas RECIRCULATION (EGR) System

• Description
• Operation
  • EGR Valve
    • Notes
    • Poppet Type
    • Internal Tapered Stem Type
    • Integral Backpressure Transducer Type
  • EGR Load Control (Wot) Valve
  • EGR Coolant Spark Control (EGR/CSC)
• Trouble Shooting
  • Rough Idle And/Or Stalling, Rough Running, Surge, Hesitation And Poor Part Throttle Performance
  • Engine Stalls On Deceleration
  • Part-Throttle Engine Detonation
  • Very Low Power At Full Throttle
  • Engine Hard To Start, No Start Or Starts & Stalls
  • Poor Fuel Economy
• Testing
  • EGR System (On Vehicle)
    • Notes
    • EGR Solenoid Mechanical Function Check
    • Diaphragm Test (Basic EGR)
    • Diaphragm Test (Integral Backpressure Type)
  • Carburetor EGR Ports