1986 Pontiac Fiero Service and Repair Manual

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Factory-Grade Data

1986 Pontiac Fiero service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Designed for technicians and DIY owners, this manual helps you diagnose issues correctly, follow proven repair steps, and use wiring diagrams and system sections to track faults faster.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Electrical diagnostics with wiring diagrams
  • Coverage across major systems: engine, transmission/driveline, brakes, steering, suspension, HVAC, and more

Trims covered

  • Sport Coupe 2-Door
  • SE Coupe 2-Door
  • Value Leader Coupe 2-Door
  • GT Coupe 2-Door

Engines covered

  • 2.5L 2474CC 151Cu. In. l4 GAS OHV Naturally Aspirated
  • 2.8L 173Cu. In. V6 GAS OHV Naturally Aspirated

Index / Table of contents

  • Body
  • Brakes
  • Chassis Electrical
  • Driveline
  • Engine Cooling
  • Engine Electrical
  • Engine Mechanical
  • Engine Performance & Emission Controls
  • Fuel System
  • General Information & Identification
  • Heating, Ventilation, & Air Conditioning
  • Hybrid & Electric Vehicle Systems
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Wiring Diagrams

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Vehicle Safety Data

1986 Pontiac Fiero Recalls & Complaints

NHTSA #89V23200028/12/1989Component: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE

DUE TO AN INTERACTION OF THE ENGINE COMPARTMENT ENVIRONMENT AND MAINTENANCE OR SERVICE RELATED FACTORS, THERE IS A RISK OF ENGINE COMPARTMENT FIRES.

Consequence

AN ENGINE COMPARTMENT FIRE CAN SPREAD TO THE PASSENGERCOMPARTMENT AND INJURE OCCUPANTS.

Remedy

CORRECT OR INSTALL NEW ENGINE COMPONENTS TO PREVENT UNREASONABLE FIRE RISK.

NHTSA #90V10400023/04/1990Component: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE

PCV GROMMET OIL LEAKS, TRANSMISSION OIL COOLER LEAKS, PISTON CONNECTING ROD FAILURES BREAKING THROUGH ENGINE WALL CAUSING OIL SPILLAGE, FUEL RAIL LEAKS, COOLANT LEAKS, ROCKER COVER OIL LEAKS, AND MAIN

Consequence

AN ENGINE COMPARTMENT FIRE CAN SPREAD TO THE PASSENGERCOMPARTMENT AND INJURE OCCUPANTS.

Remedy

CORRECT OR INSTALL NEW COMPONENTS TO PREVENT UNREASONABLE FIRE RISK.

NHTSA #06E04300019/05/2006Component: FUEL SYSTEM, GASOLINE

CERTAIN REPLACEMENT FUEL FILTERS, FRAM BRAND NAME P/N G3727, WITH DATE CODES X52911 THROUGH X60801 SEQUENTIALLY OR X600141 AND A MEXICO COUNTRY OR ORIGIN MARKING ON THE FUEL FILTER HOUSING MANUFACTURE

Consequence

THIS CONDITION MAY CAUSE AN INADEQUATE SEAL AT THE CONNECTION, POTENTIALLY LEADING TO A FUEL LEAK. I

Remedy

HONEYWELL WILL NOTIFY OWNERS AND REPLACE THE FUEL FILTERS FREE OF CHARGE. THE RECALL BEGAN ON OCTOB

NHTSA #91V05500011/04/1991Component: PARKING BRAKE:CONVENTIONAL

PARKING BRAKE ADJUSTER FAILS TO OPERATE AND DO NOT WORK AFTER BRAKE PAD WEAR.

Consequence

PARKING BRAKES WILL NOT COMPLETELY HOLD A PARKED VEHICLEWHEN PARKED ON A SLOPE, CAUSING UNINTENDED V

Remedy

REPLACE NONFUNCTIONING PARKING BRAKE ADJUSTERS.

No service bulletins No technical service bulletins on file with NHTSA for the 1986 Pontiac Fiero.
20001129Component: ENGINE AND ENGINE COOLING:ENGINE:GASOLINEFire reported1 injured

THE REAR ENGINE COMPARTMENT OF THE VEHICLE CAUGHT ON FIRE, INJURYING ONE PERSON. *SLC

20000801Component: ENGINE AND ENGINE COOLING:ENGINE:GASOLINEFire reported

WHILE DRIVING THE VEHICLE EXPERIENCED ENGINE FIRE (OHIO TRAFFIC CRASH REPORT). *MJS

19990428Component: ENGINE AND ENGINE COOLING:ENGINE:GASOLINEFire reported

APPARENTLY, THIS CAR IS INFAMOUS FOR FIRES, BUT I WAS NOT WARNED UPON PURCHASE 4 MONTHS PRIOR TO THIS, PLUS I HAD SPENT CLOSE TO $400 ON REPAIRS AFTER PURCHASE AND IT DID PASS SAFETY INSPECTION 2 WEEK

19961003Component: ELECTRICAL SYSTEM:IGNITIONFire reported

SPARK PLUG WIRE CAME IN CONTACT WITH HOT ENGINE AND BURST INTO FLAMES.

19960212Component: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC COFire reported

VEHICLE FIRE CAUSED BY THE PINE NEEDLES AND LEAVES WERE IGNITED BY A HOT CATALYTIC CONVERTER. TT

Showing the 5 most serious of 28 complaints filed with NHTSA.

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