Engine Controls - System/Component Tests - CARBURETED

• Introduction
• Microprocessor Control Unit (MCU) (4.2L)
  • Ground Circuits
  • Power Circuits
• Coolant Temperature Switch
• High Altitude Jumper
• Knock Sensor
• Oxygen Sensor
• Thermal Electric Switch
• Vacuum Switch Assembly
• Wide Open Throttle (Wot) Switch
• Computerized Engine Control System
• Diagnostic Tests
• 4.2L Engine Diagnostic Tests
• Fuel Delivery
• Fuel Control
• Idle Speed
• Ignition Coil Test
  • Notes
  • Primary Winding Resistance Test
  • Secondary Winding Resistance Test
  • Ignition Coil Output Test
• Centrifugal Advance Test
  • Functional Test
• Vacuum Advance Test
  • Functional Test
• Knock Sensor Test
  • Notes
  • Functional Test
• Air Injection System
  • Pulse Injection (4.2L)
  • Pump Injection (5.9L)
• Evaporative Fuel System
• Exhaust Gas RECIRCULATION (EGR) System
  • Notes
  • System Test
  • EGR Valve Opening Test (4.2L)
  • EGR Valve Closing Test (4.2L)
  • Coolant Temperature Override Valve (4.2L)
  • Coolant Temperature Override Valve (5.9L)
  • EGR Thermal Vacuum Switch
  • EGR Vacuum Transducer (5.9L)
• Positive Crankcase Ventilation (PCV) System
• Thermostatic Air Cleaner
  • Notes
  • Air Valve Vacuum Motor Test
  • Thermal Switch Test
  • Air Cleaner Trap Door Test
  • Reverse Delay Valve