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• 13:09, 12 July 2026 Cliff talk contribs created page 1988 suspension (Created page with "'''1988 suspension''' refers to the redesigned suspension system used on the 1988 Pontiac Fiero. The 1988 model year received the most significant suspension changes of any Fiero year. Although the basic mid-engine layout and space-frame construction remained the same, the 1988 suspension was substantially different from the 1984-1987 design. == Overview == The 1988 Fiero suspension was redesigned to improve handling, ride quality, steering feel, braking stability...")
• 13:02, 12 July 2026 Cliff talk contribs created page Getrag 5-speed (Created page with "'''Getrag 5-speed''' refers to the five-speed manual transmission used in later V6-equipped Pontiac Fiero models. The Getrag 5-speed was the factory five-speed manual transmission used with the 2.8L V6. It should not be confused with the Isuzu 5-speed, which was used with the 2.5L four-cylinder engine. == Overview == The Getrag 5-speed is a transverse manual transaxle used in later Fiero V6 applications. It replaced the earlier V6 four-speed manual transmissi...")
• 13:00, 12 July 2026 Cliff talk contribs created page Muncie 4-speed (Created page with "'''Muncie 4-speed''' refers to the four-speed manual transmission used in some Pontiac Fiero models. The Muncie 4-speed was used before the five-speed manual transmissions became common in later Fieros. It was available in different versions depending on model year, engine, and application. == Overview == The Muncie 4-speed is a transverse manual transaxle used in the Pontiac Fiero. It was used with both four-cylinder and V6 applications during Fiero production,...")
• 12:58, 12 July 2026 Cliff talk contribs created page Isuzu 5-speed (Created page with "'''Isuzu 5-speed''' refers to the five-speed manual transmission used in some Pontiac Fiero models. The Isuzu 5-speed was the factory five-speed manual transmission used with the 2.5L four-cylinder Fiero. It should not be confused with the Getrag 5-speed, which was used with the 2.8L V6. == Overview == The Isuzu 5-speed is a transverse manual transaxle used in four-cylinder Fieros. It was introduced during Fiero production as a more fuel-efficient alternative...")
• 00:29, 12 July 2026 Cliff talk contribs created page TH125 automatic (Created page with "'''TH125 automatic''' refers to the three-speed automatic transmission used in the Pontiac Fiero. The Fiero automatic transmission is commonly referred to as the '''TH125''', '''TH125C''', or '''3T40''', depending on naming convention and context. It was the factory automatic transmission available throughout Fiero production. == Overview == The TH125 automatic is a transverse three-speed automatic transmission used with both the 2.5L four-cylinder and 2.8L V6 Fie...")
• 21:55, 11 July 2026 Cliff talk contribs created page User:Cliff/Maintenance (Created page with "'''Fieropedia maintenance links''' == Recent activity == * Recent changes * New pages * New files * Logs == Files and images == * Upload file * All uploaded files * Unused files * Fieropedia images * Pages needing images == Page maintenance == * Speci...")
• 21:39, 11 July 2026 Cliff talk contribs created page 1984 Fiero Indy Pace Car (Created page with "'''1984 Fiero Indy Pace Car''' refers to the special 1984 Pontiac Fiero associated with the 1984 Indianapolis 500. The Pontiac Fiero was selected as the pace car for the 1984 Indianapolis 500. Pontiac also produced a limited-production Indy Pace Car replica for the public. The production replicas shared the Indy-themed appearance package but used the standard 2.5L Iron Duke four-cylinder engine rather than the specially prepared engine used in the actual pace ca...")
• 21:36, 11 July 2026 Cliff talk contribs created page File:1984 indy pace car.jpg (Photo by Flickr user artistmac. Original source: https://www.flickr.com/photos/26329029@N06/5376798288/in/photolist-9c8uNL-dqoxqS-ycwY7R-dN2ZN9-f8DUE1-oHSSHk-ebtJ9Y-dMWhWn-dN2RTy-dMWs5r-bsSrEh-boxB7F-bsSrxE-mFp1Rz-dQ7tgu-da3ov4-GAEjrK-9k1VnS-9jXQEz-cimbn3-9jXRdF-bDqSws-9mgvHF-f8E85N-9jXQ5n-bXAtf7-da3oQT-dMWr9D-f9XSMn-oRZPw6-faz8ry-dQ7svh-9chR8P-e9PWrk-bXAvbf-faz6Jm-da3mzF-oRYBzV-ycwSm2-9jXMNz-9chS4g-oRZb2j-dMWsLF-9mjB6N-bXzm6m-dN31Bj-dMWrKn-fajT8i-faz5qN-9chQVB License: Creative Commons Att...)
• 21:36, 11 July 2026 Cliff talk contribs uploaded File:1984 indy pace car.jpg (Photo by Flickr user artistmac. Original source: https://www.flickr.com/photos/26329029@N06/5376798288/in/photolist-9c8uNL-dqoxqS-ycwY7R-dN2ZN9-f8DUE1-oHSSHk-ebtJ9Y-dMWhWn-dN2RTy-dMWs5r-bsSrEh-boxB7F-bsSrxE-mFp1Rz-dQ7tgu-da3ov4-GAEjrK-9k1VnS-9jXQEz-cimbn3-9jXRdF-bDqSws-9mgvHF-f8E85N-9jXQ5n-bXAtf7-da3oQT-dMWr9D-f9XSMn-oRZPw6-faz8ry-dQ7svh-9chR8P-e9PWrk-bXAvbf-faz6Jm-da3mzF-oRYBzV-ycwSm2-9jXMNz-9chS4g-oRZb2j-dMWsLF-9mjB6N-bXzm6m-dN31Bj-dMWrKn-fajT8i-faz5qN-9chQVB License: Creative Commons Att...)
• 21:14, 11 July 2026 Cliff talk contribs created page File:2.8L V6 (1).jpg (Photo by Flickr user artistmac. Original source: https://www.flickr.com/photos/26329029@N06/7868771496 License: Creative Commons Attribution-ShareAlike 2.0 Generic https://creativecommons.org/licenses/by-sa/2.0/ Changes made: none. Category:Fieropedia images)
• 21:14, 11 July 2026 Cliff talk contribs uploaded File:2.8L V6 (1).jpg (Photo by Flickr user artistmac. Original source: https://www.flickr.com/photos/26329029@N06/7868771496 License: Creative Commons Attribution-ShareAlike 2.0 Generic https://creativecommons.org/licenses/by-sa/2.0/ Changes made: none. Category:Fieropedia images)
• 20:46, 11 July 2026 Cliff talk contribs created page File:Fiero 2.8L V6 firing order.png (Diagram showing cylinder layout, distributor rotation, and firing order for the Pontiac Fiero 2.8L V6. Created for Fieropedia. Category:Fieropedia images Category:Engine)
• 20:46, 11 July 2026 Cliff talk contribs uploaded File:Fiero 2.8L V6 firing order.png (Diagram showing cylinder layout, distributor rotation, and firing order for the Pontiac Fiero 2.8L V6. Created for Fieropedia. Category:Fieropedia images Category:Engine)
• 20:37, 11 July 2026 Cliff talk contribs created page 2.8L V6 (Created page with "'''2.8L V6''' refers to the factory V6 engine used in the Pontiac Fiero from 1985 through 1988. The Fiero 2.8L V6 was part of GM's 60-degree V6 engine family. It was not a Fiero-only engine, but the Fiero version was adapted for the car's transverse mid-engine layout and used multi-port fuel injection. == Overview == The 2.8L V6 was introduced in the Fiero for the 1985 model year. It gave the Fiero a factory performance engine option and was used in sportier model...")
• 14:38, 9 July 2026 User account Mmeyer86gt talk contribs was created
• 23:00, 7 July 2026 Cliff talk contribs created page Tech IV (Redirect to Iron Duke) Tag: New redirect
• 23:00, 7 July 2026 Cliff talk contribs created page Tech 4 (Redirected page to Iron Duke) Tag: New redirect
• 23:00, 7 July 2026 Cliff talk contribs created page 2.5L four-cylinder (Redirect to Iron Duke) Tag: New redirect
• 22:59, 7 July 2026 Cliff talk contribs created page 2.5L Iron Duke (Redirected page to Iron Duke) Tag: New redirect
• 22:50, 7 July 2026 Cliff talk contribs moved page Duke engine to Iron Duke (Rename to common article title)
• 18:08, 7 July 2026 Todd82TA talk contribs created page Duke engine (Created page with "The Iron Duke ... (insert history) '''Year-to-Year Changes in the Pontiac Fiero:''' '''1984:''' - Crossflow design '''1985:''' - Roller Cam (mid-year Update) '''1986:''' - V5 A/C Compressor Upgrade '''1987:''' - Elimination of ThermAC - Newer ECM (model) and Intake Air Temperature sensor - New Rochester TBI Unit - DIS Ignition '''1988:''' - Balance Shaft - Integrated Oil Filter")
• 18:04, 7 July 2026 User account Todd82TA talk contribs was created
• 17:41, 7 July 2026 User account 1985 Fiero GT talk contribs was created
• 17:37, 7 July 2026 Cliff talk contribs created page Help:Contents (Created page with "'''Help''' explains how to use and contribute to Fieropedia. Fieropedia is a community-built knowledge base for the Pontiac Fiero. == Reading Fieropedia == Anyone can read Fieropedia articles. Use the search box, the left navigation menu, article links, and categories to browse information. == Editing Fieropedia == To edit pages or create new pages, you need to create an account and log in. Anonymous visitors can read the wiki, but cannot edit or create pages....")
• 21:22, 6 July 2026 Cliff talk contribs created page 1986.5 Fiero GT (Created page with "'''1986.5 Fiero GT''' is an enthusiast term commonly used for the fastback version of the 1986 Pontiac Fiero GT. The term “1986.5” is not an official Pontiac model year. It is commonly used by Fiero owners to distinguish the later 1986 fastback GT from the earlier 1986 notchback GT. == Overview == During the 1986 model year, the Fiero GT changed from the earlier notchback body style to the fastback body style. Because this change happened during the model yea...")
• 21:21, 6 July 2026 Cliff talk contribs created page Model years (Created page with "'''Model years''' provides an overview of the Pontiac Fiero by production year. The Pontiac Fiero was produced for five model years, from 1984 through 1988. Each year had changes in available models, engines, equipment, styling, suspension, brakes, electrical systems, and options. == Overview == Although all Fieros share the same basic mid-engine layout and space-frame construction, there are important differences between model years. Some changes were cosmetic,...")
• 21:19, 6 July 2026 Cliff talk contribs created page MediaWiki:Sidebar (Created page with "* navigation ** mainpage|Main page ** Pontiac Fiero|Pontiac Fiero ** Category:Model years|Model years ** Common problems|Common problems ** Service procedures|Service procedures ** Diagnostic trouble codes|Trouble codes ** Cooling system|Cooling system ** Modifications|Modifications ** Reference|Reference * community ** Pennock's Fiero Forum|Pennock's Fiero Forum ** Fieropedia:Editing guidelines|Editing guidelines ** recentchanges-url|Recent changes ** Special:WantedPag...")
• 20:45, 6 July 2026 Cliff talk contribs created page Fuel pressure test (Created page with "'''Fuel pressure test''' refers to checking fuel-system pressure on the Pontiac Fiero. A fuel pressure test is useful when diagnosing no-start conditions, hesitation, poor acceleration, lean or rich running, stalling, hard starting, and fuel-related diagnostic trouble codes. == Overview == The Fiero fuel system must provide the correct pressure and volume for the engine to run properly. Low fuel pressure can cause lean running, hesitation, stalling, poor accelera...")
• 20:44, 6 July 2026 Cliff talk contribs created page Radiator (Created page with "'''Radiator''' refers to the front-mounted heat exchanger used by the Pontiac Fiero Cooling system. The radiator removes heat from the engine coolant. Because the Fiero has a rear-mounted engine and a front-mounted radiator, the radiator is connected to the engine by long Coolant pipes running underneath the car. == Overview == The Fiero radiator is mounted at the front of the vehicle, while the engine is mounted behind the passenger compartment. Coolant...")
• 20:43, 6 July 2026 Cliff talk contribs created page Water pump (Created page with "'''Water pump''' refers to the coolant pump used by the Pontiac Fiero Cooling system. The water pump circulates coolant through the engine, coolant pipes, and radiator. It is essential for removing heat from the engine and maintaining normal operating temperature. == Overview == The Fiero uses a rear-mounted engine and a front-mounted radiator. Because of this layout, the water pump must move coolant through long coolant pipes running between the engine compar...")
• 20:42, 6 July 2026 Cliff talk contribs created page Thermostat (Created page with "'''Thermostat''' refers to the coolant thermostat used in the Pontiac Fiero Cooling system. The thermostat helps control engine warm-up and operating temperature by regulating coolant flow through the cooling system. == Overview == The Fiero thermostat is part of the engine cooling system. It remains closed or mostly closed when the engine is cold, helping the engine warm up more quickly. As coolant temperature rises, the thermostat opens and allows coolant to...")
• 20:42, 6 July 2026 Cliff talk contribs created page Coolant pipes (Created page with "'''Coolant pipes''' refers to the long coolant tubes used by the Pontiac Fiero cooling system. Because the Fiero engine is mounted behind the passenger compartment and the radiator is mounted at the front of the car, coolant must travel through long pipes running along the underside of the vehicle. == Overview == The Fiero cooling system is different from many front-engine cars because the engine and radiator are far apart. Coolant travels from the engine to the...")
• 20:41, 6 July 2026 Cliff talk contribs created page Radiator fan relay (Created page with "'''Radiator fan relay''' refers to the electrical relay used to switch power to the Pontiac Fiero Radiator fan. The radiator fan relay allows a low-current control circuit to turn on the higher-current radiator fan motor. == Overview == The radiator fan motor requires more current than a simple temperature switch or control circuit should carry directly. The radiator fan relay acts as an electrical switch. When the control side of the relay is activated, the...")
• 20:40, 6 July 2026 Cliff talk contribs created page Radiator fan switch (Created page with "'''Radiator fan switch''' refers to the temperature switch used to turn on the Pontiac Fiero Radiator fan on models that use a fan switch. The radiator fan switch is part of the cooling-system control circuit. It should not be confused with the Coolant temperature sensor used by the ECM or the Coolant temperature sender used by the dashboard Temperature gauge. == Overview == The Fiero uses several temperature-related parts, and they are often c...")
• 20:39, 6 July 2026 Cliff talk contribs created page Radiator fan (Created page with "'''Radiator fan''' refers to the electric cooling fan used at the front radiator of the Pontiac Fiero. The radiator fan helps pull air through the radiator when vehicle speed or natural airflow is not enough to keep coolant temperature under control. == Overview == The Fiero radiator is mounted at the front of the car, while the engine is mounted behind the passenger compartment. Because of this layout, the cooling system uses long coolant pipes between the engin...")
• 20:39, 6 July 2026 Cliff talk contribs created page Coolant temperature sender (Created page with "'''Coolant temperature sender''' refers to the engine-mounted sender used for the Pontiac Fiero dashboard Temperature gauge and temperature warning-light circuit. The coolant temperature sender should not be confused with the Coolant temperature sensor used by the ECM. == Overview == The Fiero uses separate temperature-related parts for different purposes. The coolant temperature sender provides information to the instrument cluster. The ECM coolant...")
• 20:38, 6 July 2026 Cliff talk contribs created page Temperature gauge (Created page with "'''Temperature gauge''' refers to the dashboard engine-temperature gauge used in the Pontiac Fiero Instrument cluster. The temperature gauge displays engine coolant temperature to the driver. It should not be confused with the Coolant temperature sensor used by the ECM. == Overview == The Fiero uses separate temperature-related parts for different purposes. The dashboard temperature gauge receives its signal from the temperature gauge sender. The ECM...")
• 20:38, 6 July 2026 Cliff talk contribs created page Instrument cluster (Created page with "'''Instrument cluster''' refers to the dashboard gauge and warning-light assembly used in the Pontiac Fiero. The instrument cluster displays important vehicle information such as speed, fuel level, engine temperature, warning lights, and other driver information depending on model year and equipment. == Overview == The Fiero instrument cluster is part of the interior and electrical system. It provides visual information to the driver and receives signals from sev...")
• 20:37, 6 July 2026 Cliff talk contribs created page Speedometer (Created page with "'''Speedometer''' refers to the vehicle-speed display system used in the Pontiac Fiero instrument cluster. The speedometer displays vehicle speed to the driver and is closely related to the Vehicle speed sensor circuit. Vehicle speed information is also used by the ECM for certain engine-management and diagnostic functions. == Overview == The Fiero speedometer system receives a signal from the Vehicle speed sensor, often abbreviated as VSS. The VSS is...")
• 20:36, 6 July 2026 Cliff talk contribs created page Idle problems (Created page with "'''Idle problems''' refers to high idle, low idle, rough idle, surging idle, stalling at idle, or unstable idle behavior on the Pontiac Fiero. Idle problems can be caused by many different systems. Common causes include Vacuum leaks, throttle-body problems, Idle air control valve problems, Throttle position sensor faults, EGR leaks, ignition problems, fuel problems, sensor faults, wiring problems, or poor grounds. == Overview == The ECM controls id...")
• 20:35, 6 July 2026 Cliff talk contribs created page Throttle body (Created page with "'''Throttle body''' refers to the air-control assembly used by the Pontiac Fiero engine. The throttle body controls the amount of air entering the engine. It also carries or works with several important engine-management parts, including the Throttle position sensor and Idle air control valve. == Overview == The throttle body is part of the intake system. When the accelerator pedal is pressed, the throttle linkage opens the throttle plate. This allows mor...")
• 20:34, 6 July 2026 Cliff talk contribs created page CALPAK (Created page with "'''CALPAK''' refers to a calibration package used in the Pontiac Fiero ECM. The CALPAK provides backup calibration information used by the ECM. It is related to, but separate from, the PROM. == Overview == The Fiero ECM uses calibration information to control engine operation. The PROM contains the main calibration data, while the CALPAK provides backup or supporting calibration information used by the ECM. A faulty, incorrect, poorly seated, or damag...")
• 20:34, 6 July 2026 Cliff talk contribs created page PROM (Created page with "'''PROM''' refers to the removable calibration chip used in the Pontiac Fiero ECM. PROM stands for '''Programmable Read-Only Memory'''. In the Fiero ECM, the PROM contains calibration information used by the ECM to control the engine. == Overview == The PROM contains engine and vehicle-specific calibration data. This information tells the ECM how to manage fuel delivery, ignition timing, idle behavior, emissions functions, diagnostic behavior, and other engine...")
• 20:33, 6 July 2026 Cliff talk contribs created page EGR tube (Created page with "'''EGR tube''' refers to the exhaust gas recirculation tube used on the Pontiac Fiero EGR system. The EGR tube carries exhaust gas from the exhaust side of the engine to the intake side so that exhaust gas can be recirculated under certain operating conditions. == Overview == The EGR tube is part of the exhaust gas recirculation system. On the Fiero, the EGR tube is especially important on the 2.8L V6 because cracks or leaks in the tube can create vacuum-leak...")
• 20:33, 6 July 2026 Cliff talk contribs created page EGR valve (Created page with "'''EGR valve''' refers to the exhaust gas recirculation valve used by the Pontiac Fiero EGR system. The EGR valve controls the flow of exhaust gas into the intake system. It is part of the emissions-control system and is controlled indirectly by the ECM through the EGR solenoid and vacuum system. == Overview == EGR stands for '''Exhaust Gas Recirculation'''. The EGR valve allows a controlled amount of exhaust gas to enter the intake under certain oper...")
• 20:32, 6 July 2026 Cliff talk contribs created page EGR solenoid (Created page with "'''EGR solenoid''' refers to the electrically controlled vacuum solenoid used by the Pontiac Fiero EGR system. The EGR solenoid controls vacuum to the EGR valve. The ECM controls the solenoid to determine when EGR operation is allowed. == Overview == The EGR solenoid is part of the exhaust gas recirculation system. The ECM does not open the EGR valve directly. Instead, it controls the EGR solenoid, which controls vacuum to the EGR valve. When the corr...")
• 20:32, 6 July 2026 Cliff talk contribs created page Category:Emissions (Created page with "'''Emissions''' contains articles about emissions-control systems and related diagnostic topics on the Pontiac Fiero. Category:Fieropedia")
• 20:31, 6 July 2026 Cliff talk contribs created page EGR system (Created page with "'''EGR system''' refers to the exhaust gas recirculation system used on the Pontiac Fiero. EGR stands for '''Exhaust Gas Recirculation'''. The system allows a controlled amount of exhaust gas to enter the intake under certain operating conditions. This helps reduce combustion temperature and emissions. == Overview == The EGR system is an emissions-control system. It is not active under all driving conditions. The ECM controls EGR operation based on engine temp...")
• 20:31, 6 July 2026 Cliff talk contribs created page Idle air control valve (Created page with "'''Idle air control valve''' refers to the idle-control valve used by the Pontiac Fiero ECM. The idle air control valve is often abbreviated as IAC. It allows the ECM to control idle speed by adjusting the amount of air that bypasses the throttle plate. == Overview == The IAC valve is part of the throttle-body and idle-control system. When the throttle is closed, the engine still needs air to idle. The ECM controls this bypass air through the IAC valve. By mo...")
• 20:30, 6 July 2026 Cliff talk contribs created page Vehicle speed sensor (Created page with "'''Vehicle speed sensor''' refers to the speed sensor used by the Pontiac Fiero to provide vehicle-speed information. The vehicle speed sensor is often abbreviated as VSS. The VSS signal is used by the speedometer system and is also used by the ECM for engine-management and diagnostic functions. == Overview == The vehicle speed sensor provides information about how fast the car is moving. On the Fiero, vehicle speed information is important for the speedomete...")