Engine Controls - Theory & Operation

• Introduction
• Air Induction System
  • Turbocharger (4.3L)
    • Notes
    • Charge Air Cooler
  • Airflow Sensing
    • Speed Density
• Computerized Engine Controls (Gasoline)
  • Notes
  • Electronic Control Module (ECM)
    • Notes
    • Arithmetic Logic Unit (Alu)
    • Central Processing Unit (CPU)
    • Power Supply
    • Memories
  • Input Devices
    • Notes
    • A/C On (A/C Request) Signal
    • Battery Voltage
    • Brake Switch Feedback
    • Coolant Temperature Sensor (Cts)
    • Crank Signal
    • Digital Ratio Adapter Controller (DRAC)
    • Fuel Pump Feedback
    • Gear Switches
    • Knock Sensor
    • Manifold Absolute Pressure (Map) Sensor
    • Manifold Air Temperature (Mat) Sensor (2.5L & 4.3L Turbo)
    • Oxygen (O2) Sensor
    • Park/Neutral (P/N) Switch
    • Power Steering (P/S) Switch (2.5L)
    • Pressure Switch Manifold (PSM) (4L80-E Transmission)
    • Rpm Reference Signal
    • Throttle Position Sensor (TPS)
    • Transmission Temperature Sensor (TTS) (4L80-E Transmission)
    • Vehicle Speed Sensor (VSS)
  • Output Signals
• Computerized Engine Controls (Diesel)
  • Notes
  • Electronic Control Module (ECM)
    • Notes
    • Memories
  • Input Devices
    • Notes
    • Coolant Temperature Sensor (Cts)
    • Manifold Absolute Pressure (Map) Sensor
    • Throttle Position Sensor (TPS)
    • Engine Speed Sensor
    • Vehicle Speed Sensor (VSS)
  • Output Signals
• Fuel System (Gasoline)
  • Fuel Delivery (Gas)
    • Fuel Module (7.4L, 5.7L G Van & 5.7L Over 8500 GVWR)
    • Fuel Pump
    • Fuel Pressure Regulator (TBI)
    • Fuel Pressure Regulator (4.3L Turbo PFI)
    • Fuel Pump Relay
  • Fuel Control (Gas)
    • Notes
    • Open Loop
    • Closed Loop
    • Battery Voltage Correction
    • Fuel Cut-Off
    • Throttle Body Injection
    • Port Fuel Injection (PFI)
  • Idle Speed (Gas)
    • Notes
    • Idle Air Control (IAC) Valve
• Fuel System (Diesel)
  • Fuel Delivery (Diesel)
    • Notes
    • Diesel Injection Pump
    • Fuel Injection Lines
  • Fuel Control (Diesel)
    • Electronic Controller/Glow Plug Relay
    • Glow Plugs
    • Glow Plug Inhibit Switch
    • Glow Plug After-Start
    • Injection Nozzles
    • Housing Pressure Cold Advance (HPCA)
    • Cold Advance Control
  • Idle Speed (Diesel)
    • Curb Idle Speed
    • Fast Idle Speed
• Ignition System (Gasoline)
  • Notes
  • Engine Controls - Theory & Operation
    • High Energy Ignition Electronic Spark Timing (HEI-Est) Distributor
• Ignition Timing Control Systems (Gasoline)
  • Engine Controls - Theory & Operation
    • Ignition Timing Advance
    • ESC Detonation Retard Operation
• Emission Systems (Gas)
  • Air Injection System
    • Notes
    • Electric Air Control (EAC) Valves With Relief Tube
    • Air Pump
    • Check Valves
    • Air Management System
  • Catalytic Converter
  • Exhaust Gas RECIRCULATION (EGR)
    • Notes
    • Port EGR
    • Negative BACKPRESSURE EGR
  • Evaporative Emission Control
    • Notes
    • Carbon Canister
    • Canister Control Valve (CCV) (High Altitude 4.3L Except "S" & "T" Series & V8)
    • Thermostatic Vacuum Switch (2.8L & 3.1L)
    • Fuel Tank Pressure Control Valve (High Altitude 4.3L Except "S" & "T" Series & V8)
  • Positive Crankcase Ventilation (PCV)
  • Thermostatic Air Cleaner (TAC)
    • Notes
    • Vacuum Motor Controlled (2.8L & 3.1L)
    • Wax Pellet Controlled (Except 2.8L & 3.1L)
• Emission Systems (Diesel)
  • Exhaust Gas RECIRCULATION (EGR)
    • Notes
    • EGR Valve
    • EPR Valve
    • EGR/EPR Solenoids
    • EGR Fault Detection
    • Vacuum Pump
  • Crankcase Depression Regulator (CDR)
• Self-Diagnostic System
  • Notes
  • Engine Controls - Theory & Operation
    • "Hard Failures"
    • "Intermittent Failures"
  • Service Engine Soon Light
  • Serial Data
• Miscellaneous ECM Controls
  • Notes
  • A/C Clutch
    • Notes
    • A/C Pressure Switches
  • Cooling Fan (3.1L Only)
  • Transmission
    • Converter Clutch
    • Electronic Transmission (4L80-E)
    • Shift Light