Diesel Exhaust Gas RECIRCULATION

• Description
• Operation
  • Modulated (Internal) EGR System (Federal Vehicles)
  • Throttle Position Modified Orifice (External) EGR System (CALIF. Vehicles)
• Trouble Shooting
  • EGR Valve Will Not Open
  • Heavy Smoke On Acceleration EGR Valve Will Not Close
  • EGR Valve Closes Early
  • Smoke On Medium Acceleration EGR Valve Closes Late (CALIF. Models)
  • Loss Of Performance, Smokey Exhaust