Fiero L4-151 2.5L (1985): Powertrain Management
Also for this vehicle: Fiero V6-173 2.8L (1986).
Diagnostics
Maintenance
Engine
Transmission
Brakes
Electrical
Steering & suspension
Heating & A/C
Body & interior
Choose Sections to see everything in a chapter, or a chapter title to start at its first page.
Relays and Modules - Powertrain Management19 pages
Relays and Modules - Computers and Control Systems18 pages
Engine Control Module › Component Information17 pages
Technical Service Bulletins › Technical Service Bulletins for Engine Control Module:10 pages
- 04-06-04-054B › Nov › 10 › Engine Controls - Aftermarket Accessory Usage2
- 91648 › Aug › 91 › ECM/PCM - Damaged and/or Mis-Diagnosed
- 9064 › Sep › 89 › ECM - Packard 32-Way Connector Identification
- 89666 › Aug › 89 › ECM - Packard 32 Way Connector Identification
- 8861 › Sep › 87 › Engine Controls - ECM May Contain Wrong PROM
- 87640 › May › 87 › ECM - Revised Replacement Procedure234
- Description and Operation › Electronic Spark Timing (EST)2
- Testing and Inspection › Diagnostic Trouble Code Descriptions2
- Service and Repair › Engine Control Module (ECM) Replacement23
- Idle/Throttle Speed Control Unit › Component Information › Specifications
- Relays and Modules - Fuel Delivery and Air Induction › Idle/Throttle Speed Control Unit › Component Information › Specifications
Sensors and Switches - Powertrain Management38 pages
Sensors and Switches - Computers and Control Systems27 pages
- Absolute Pressure Sensor <--> [Barometric Pressure Sensor] › Component Information › Specifications
- Coolant Temperature Sensor/Switch (For Computer) › Component Information › Specifications2
- Manifold Air Temperature (MAT) Sensor <--> [Intake Air Temperature Sensor] › Component Information › Specifications2
- Manifold Pressure/Vacuum Sensor › Component Information › Specifications2345
- Oxygen Sensor › Component Information › Technical Service Bulletins › Oxygen Sensors - Silica Contamination
- Power Steering Pressure Switch › Component Information › Testing and Inspection2
Throttle Position Sensor › Component Information › Technical Service Bulletins10 pages
All Technical Service Bulletins for Throttle Position Sensor:5 pages
All Other Service Bulletins for Throttle Position Sensor:3 pages
- Transmission Position Switch/Sensor, A/T › Component Information › Testing and Inspection2
- Vehicle Speed Sensor › Component Information › Locations2
Sensors and Switches - Fuel Delivery and Air Induction11 pages
- Oil Pressure Switch (For Fuel Pump) › Component Information › Locations
Throttle Position Sensor › Component Information › Technical Service Bulletins10 pages
All Technical Service Bulletins for Throttle Position Sensor:5 pages
All Other Service Bulletins for Throttle Position Sensor:3 pages
Tune-up and Engine Performance Checks42 pages
Fuel Pressure › System Information3 pages
Idle Speed › System Information4 pages
Air Cleaner Housing › Air Filter Element › Component Information › Technical Service Bulletins5 pages
- Customer Interest: › 04-07-30-013B › Feb › 07 › Engine, A/T - Shift/Driveability Concerns/MIL ON2
- All Technical Service Bulletins: › 04-07-30-013B › Feb › 07 › Engine, A/T - Shift/Driveability Concerns/MIL ON2
- All Other Service Bulletins for Air Filter Element: › 87320 › Sep › 87 › Turn Signal Lever - Rattles
- All Other Service Bulletins for Air Filter Element: › 87320 › Sep › 87 › Turn Signal Lever - Rattles
- Fuel Filter › Fuel Pressure Release › System Information › Service and Repair
- Firing Order › Component Information › Specifications › Ignition Firing Order
Spark Plug Wire <--> [Ignition Cable] › Component Information › Technical Service Bulletins4 pages
All Technical Service Bulletins for Spark Plug Wire:2 pages
Customer Interest for Spark Plug Wire:2 pages
Distributor, Ignition14 pages
- Distributor Retard Control › Component Information › Description and Operation › Distributor Spark Vacuum Retard Delay Valve (DS-VRDV)2
Distributor Vacuum Control › Component Information8 pages
- Vacuum Spark Delay Valve › Component Information › Description and Operation › Delay Valve Trapped Spark (DV-TS)234
Spark Plug › Component Information5 pages
- Compression Check › System Information › Specifications
- Valve Clearance › System Information › Specifications2
Computers and Control Systems101 pages
- Manifold Air Temperature (MAT) Sensor <--> [Intake Air Temperature Sensor] › Component Information › Specifications2
- Absolute Pressure Sensor <--> [Barometric Pressure Sensor] › Component Information › Specifications
- Coolant Temperature Sensor/Switch (For Computer) › Component Information › Specifications2
- Data Link Connector › Component Information › Locations
Engine Control Module › Component Information17 pages
Technical Service Bulletins › Technical Service Bulletins for Engine Control Module:10 pages
- 04-06-04-054B › Nov › 10 › Engine Controls - Aftermarket Accessory Usage2
- 91648 › Aug › 91 › ECM/PCM - Damaged and/or Mis-Diagnosed
- 9064 › Sep › 89 › ECM - Packard 32-Way Connector Identification
- 89666 › Aug › 89 › ECM - Packard 32 Way Connector Identification
- 8861 › Sep › 87 › Engine Controls - ECM May Contain Wrong PROM
- 87640 › May › 87 › ECM - Revised Replacement Procedure234
- Description and Operation › Electronic Spark Timing (EST)2
- Testing and Inspection › Diagnostic Trouble Code Descriptions2
- Service and Repair › Engine Control Module (ECM) Replacement23
- Idle Speed/Throttle Actuator - Electronic › Component Information › Technical Service Bulletins › Fuel - Idle Speed Control Explanation
- Idle/Throttle Speed Control Unit › Component Information › Specifications
- Malfunction Indicator Lamp › Component Information › Service and Repair
- Manifold Pressure/Vacuum Sensor › Component Information › Specifications2345
- Memory Calibration Unit › Component Information › Technical Service Bulletins › PROM/MEMCAL - Identification Marks2
- Mixture Control Solenoid › Component Information › Specifications
- Oxygen Sensor › Component Information › Technical Service Bulletins › Oxygen Sensors - Silica Contamination
- Power Steering Pressure Switch › Component Information › Testing and Inspection2
Relays and Modules - Computers and Control Systems20 pages
Engine Control Module › Component Information19 pages
Technical Service Bulletins12 pages
- Engine Controls - Aftermarket Accessory Usage2
Technical Service Bulletins for Engine Control Module:10 pages
- 04-06-04-054B › Nov › 10 › Engine Controls - Aftermarket Accessory Usage2
- 91648 › Aug › 91 › ECM/PCM - Damaged and/or Mis-Diagnosed
- 9064 › Sep › 89 › ECM - Packard 32-Way Connector Identification
- 89666 › Aug › 89 › ECM - Packard 32 Way Connector Identification
- 8861 › Sep › 87 › Engine Controls - ECM May Contain Wrong PROM
- 87640 › May › 87 › ECM - Revised Replacement Procedure234
- Description and Operation › Electronic Spark Timing (EST)2
- Testing and Inspection › Diagnostic Trouble Code Descriptions2
- Service and Repair › Engine Control Module (ECM) Replacement23
- Idle/Throttle Speed Control Unit › Component Information › Specifications
Sensors and Switches - Computers and Control Systems27 pages
- Absolute Pressure Sensor <--> [Barometric Pressure Sensor] › Component Information › Specifications
- Coolant Temperature Sensor/Switch (For Computer) › Component Information › Specifications2
- Manifold Air Temperature (MAT) Sensor <--> [Intake Air Temperature Sensor] › Component Information › Specifications2
- Manifold Pressure/Vacuum Sensor › Component Information › Specifications2345
- Oxygen Sensor › Component Information › Technical Service Bulletins › Oxygen Sensors - Silica Contamination
- Power Steering Pressure Switch › Component Information › Testing and Inspection2
Throttle Position Sensor › Component Information › Technical Service Bulletins10 pages
All Technical Service Bulletins for Throttle Position Sensor:5 pages
All Other Service Bulletins for Throttle Position Sensor:3 pages
- Transmission Position Switch/Sensor, A/T › Component Information › Testing and Inspection2
- Vehicle Speed Sensor › Component Information › Locations2
- Shift Light › Component Information › Testing and Inspection2
- Tach Filter › Component Information › Locations
Throttle Position Sensor › Component Information › Technical Service Bulletins10 pages
All Technical Service Bulletins for Throttle Position Sensor:5 pages
All Other Service Bulletins for Throttle Position Sensor:3 pages
- Transmission Position Switch/Sensor, A/T › Component Information › Testing and Inspection2
- Vehicle Speed Sensor › Component Information › Locations2
Emission Control Systems70 pages
Managed Air Injection Reactor (MAIR) <--> [Air Injection]21 pages
- Electric Divert/Electric Air Switching (ED/ES) <--> [Air Diverter Valve] › Component Information › Description and Operation › Diverter Valve2345678
- Air Injection Check Valve › Component Information › Testing and Inspection
- Air Injection Control Valve › Component Information › Description and Operation › Electric Air Control & Electric Air Switching (EAC/ES)234
- Air Injection Filter › Component Information › Service and Repair
- Air Injection Pump › Component Information › Testing and Inspection23
- Pulsair Valve, Secondary Air Injection › Component Information › Description and Operation › Pulse Air Injection Reaction (Pair, Pulsair)2
- Differential Vacuum Delay & Separator Valve <--> [Vacuum Delay Valve, Air Injection] › Component Information › Description and Operation2
Catalytic Converter › Component Information5 pages
Evaporative Emissions System14 pages
- Bowl Vent Valve › Component Information › Testing and Inspection
- Canister Purge Control Valve › Component Information › Description and Operation2
- Canister Purge Solenoid › Component Information › Description and Operation
- Evaporative Emission Control Canister › Component Information › Description and Operation2345
Thermal Vacuum Valve - EVAP › Component Information5 pages
Exhaust Gas Recirculation16 pages
- EGR Vacuum Solenoid Valve <--> [EGR Control Solenoid] › Component Information › Locations2
- EGR Valve › Component Information › Testing and Inspection23
Thermal Vacuum Valve, EGR › Component Information10 pages
- Vacuum Delay Valve, EGR › Component Information › Description and Operation
- Positive Crankcase Ventilation › Component Information › Description and Operation2345
- Thermostatic Air Cleaner › Thermostatic Air Cleaner Vacuum Switch › Component Information › Description and Operation › Thermac Secondary Vacuum Break Thermal Vacuum Switch (SVB-TVS)23
Fuel Delivery and Air Induction79 pages
Fuel Pressure › System Information3 pages
- Fuel Pressure Release › System Information › Service and Repair
Idle Speed › System Information4 pages
Air Cleaner Housing › Air Filter Element › Component Information › Technical Service Bulletins4 pages
- Carburetor › Component Information › Service Precautions
Cold Start Injector › Component Information3 pages
- Fuel › Component Information › Technical Service Bulletins › Fuel System - TOP TIER Detergent Gasoline (Canada)2345678
- Fuel Filler Cap › Component Information › Description and Operation
- Fuel Filter › Fuel Pressure Release › System Information › Service and Repair
Fuel Injector › Component Information6 pages
Fuel Pump › Fuel Pressure › System Information3 pages
- Fuel Return Line › Component Information › Technical Service Bulletins › Fuel - Lines On All Multi-Port Fuel Injected Engines23
- Fuel Supply Line › Component Information › Technical Service Bulletins › Fuel - Lines On All Multi-Port Fuel Injected Engines23
- Fuel Tank › Fuel Tank Pressure Release Valve › Component Information › Description and Operation
Fuel Level Sending Unit <--> [Fuel Tank Unit] › Component Information › Technical Service Bulletins2 pages
- Idle Speed/Throttle Actuator - Electronic › Component Information › Technical Service Bulletins › Fuel - Idle Speed Control Explanation
- Idle/Throttle Speed Control Unit › Component Information › Specifications
- Oil Pressure Switch (For Fuel Pump) › Component Information › Locations
- Relays and Modules - Fuel Delivery and Air Induction › Idle/Throttle Speed Control Unit › Component Information › Specifications
Sensors and Switches - Fuel Delivery and Air Induction11 pages
- Oil Pressure Switch (For Fuel Pump) › Component Information › Locations
Throttle Position Sensor › Component Information › Technical Service Bulletins10 pages
All Technical Service Bulletins for Throttle Position Sensor:5 pages
All Other Service Bulletins for Throttle Position Sensor:3 pages
Throttle Body › Component Information8 pages
Throttle Cable/Linkage › Component Information › Technical Service Bulletins2 pages
Throttle Position Sensor › Component Information › Technical Service Bulletins10 pages
All Technical Service Bulletins for Throttle Position Sensor:5 pages
All Other Service Bulletins for Throttle Position Sensor:3 pages
Ignition System36 pages
- Firing Order › Component Information › Specifications › Ignition Firing Order
Distributor, Ignition14 pages
- Distributor Retard Control › Component Information › Description and Operation › Distributor Spark Vacuum Retard Delay Valve (DS-VRDV)2
Distributor Vacuum Control › Component Information8 pages
- Vacuum Spark Delay Valve › Component Information › Description and Operation › Delay Valve Trapped Spark (DV-TS)234
Spark Plug Wire <--> [Ignition Cable] › Component Information › Technical Service Bulletins4 pages
All Technical Service Bulletins for Spark Plug Wire:2 pages
Customer Interest for Spark Plug Wire:2 pages
- Ignition Coil › Component Information › Specifications › C3I Ignition System2
- Pick-Up Coil, Ignition › Component Information › Specifications
Spark Plug › Component Information5 pages
- Tach Filter › Component Information › Locations
- Distributor Thermal Vacuum Switch <--> [Thermal Vacuum Valve, Vacuum/Dist. Advance] › Component Information › Description and Operation › Choke Vacuum Break Distributor Thermal Vacuum Switch2345
- Vacuum Advance Control Solenoid › Component Information › Description and Operation
- Transmission Control Systems › Sensors and Switches - Transmission and Drivetrain › Sensors and Switches - A/T › Transmission Position Switch/Sensor, A/T › Component Information › Testing and Inspection2