LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Dodge and Ram >> 1991 >> Stealth Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Emission Systems & Sub-Systems >> Exhaust Gas RECIRCULATION (EGR) >> System Testing (California)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

System Testing (California)

  1. Connect vacuum "T" fitting into Green-striped hose from EGR valve, and connect vacuum gauge to vacuum tee. When engine coolant temperature is 68°F (20°C) or less and engine is idling, snap throttle open to race engine. If no change in vacuum reading is detected on gauge, system is okay.
  2. When engine coolant temperature is 158°F (70°C) or more and engine is idling, snap throttle open to race engine. If vacuum increases to 3.9 in. Hg or higher, system is okay.
  3. Using vacuum pump, apply specified vacuum to open EGR valve. See EGR VALVE SPECIFICATIONS  table. If idle becomes unstable or engine stalls, system is okay.
scientia non olet · About LEMON Manuals