Assorted switches and sensors provide the Electronic Control Assembly (ECA), with engine operating information required for accurate fuel control. Based on information received, the ECA attempts to control the air/fuel ratio at 14.7:1; the optimum ratio for reduced exhaust emissions. The ECA also controls some functions of the evaporative emission, ignition and deceleration systems.
Contents
Section: Theory & Operation- Introduction
- Control Unit
- A/c Clutch
- Barometric Pressure Switch (bps)
- Blower Control Switch
- Brake On-Off Switch
- Clutch Engage Switch
- Coolant Temperature Sensor (ECT)
- EGR Valve Position Sensor (evp)
- Engine Cooling Fan
- Exhaust Gas Oxygen Sensor (ego)
- Headlight Switch
- Idle Switch
- Ignition Diagnostic Monitor
- Ignition Switch Start Position
- Neutral Gear Switch
- Power Relay
- Radiator Temperature Switch
- Top Gear Switch
- W.o.t. Vacuum Switch (wvs)
- A/c Switch
- Cranking Signal (tracer)
- Engine Coolant Temperature Sensor
- Exhaust Gas Oxygen Sensor
- MAP Sensor (MAP)
- Neutral Safety Switch
- Power Steering Switch (tracer)
- Rear Defroster Switch
- Throttle Position Sensor
- Vane Air Flow Meter (vaf)
- Vane Air Temperature Sensor (vat)
- Vehicle Deceleration Sensor (tracer)
- Wide Open Throttle Switch
- EGR Control Solenoid
- EGR Solenoid No. 2
- Early Fuel Evaporation Heater (efe)
- Feedback Carburetor Actuator (fbca)
- Load Control Solenoids
- Canister Purge Solenoid (canp)
- Fuel Injectors
- Idle Speed Control By-Pass Air
- Feedback Control Carburetor (fbc)
- Electronic Fuel Injection (efi)
- By-Pass Airflow
- Fuel Pressure Regulator
- Control Circuit
- Fuel Pump Shut-Off (inertia) Switch
- Mechanical Fuel Pump (carbureted)
- Ignition Module
- High Altitude Spark Advance Correction
- EGR (carbureted)
- Pulse Air (carbureted)
- Deceleration System (carbureted)
- High Altitude Compensation (hac)
- Canister Pressure Regulator Valve
- Canister Purge Regulator
- Canister Purge Solenoid
- Canister Purge Valve
- Carburetor Fuel Bowl Solenoid Vent Valve
- Self-Diagnostic System
- Hard Failures
- Intermittent Failures
- Check Engine Light
- Abbreviations
- Adjustments
- Application
- Automatic Trans
- Axle Shafts
- Basic Trouble Shooting
- Brakes
- Charging System
- Check Lists
- Clutches Manual & Hydraulic
- Computer Relearn
- Cooling System (mechanical)
- Diagnostic Connector Locations
- Driveline/axles
- Electrical
- Electrical Component Locations
- Emission Applications
- Engine
- Engine Performance
- Fuses & Circuit Breakers
- Gauges & Instrument Panels
- General Servicing - All Makes
- Heated Glass/defoggers
- Heater
- Identification
- Manual HVAC System
- Manual Trans
- MAP Guidelines
- Mechanical
- Mechanical - Hydraulic
- Metric Conversions
- Pin Voltage Charts
- Procedures
- Removal & Installation
- Reset Procedures
- Sensor Range Charts
- Specifications
- Starter
- Steering
- Steering Column
- Steering Gear
- Suspension Front
- Suspension Rear
- Testing & Diagnostics
- Theory & Operation
- Timing Belt
- Transmission
- Wheel Alignment
- Wiper/washer Systems
- Wiring Diagrams - Engine Performance