🏷️ Basic Information Identification Make: Mitsubishi Model: Eclipse Year: 1991 Generation: First Generation (1G) Codes Chassis Code: D22A/D27A Platform: Mitsubishi Galant VR-4 platform (shared with Eagle Talon, Plymouth Laser) 👋 Introduction Market Position Segment: Compact sports coupe, competing in the affordable performance segment. Competitive Analysis Competitors: Nissan 240SX, Toyota Celica, Honda Prelude, Ford Probe, Mazda MX-6. Key Features Design: Sleek, aerodynamic styling, available in front-wheel drive (FWD) and all-wheel drive (AWD) configurations (AWD shared with Galant VR-4 platform). Performance Options: Naturally aspirated and turbocharged engine options, offering a balance of performance and value. Significance Legacy: Marked Mitsubishi's entry into the sport compact market in North America and established a performance image for the brand, later evolving into the Eclipse GT and performance variants. 📋 Manual Details Coverage Areas Trim Levels: GS, GS-X, GS Turbo (Australia), RS, GST Regional Variants: North America, Australia, Japan (specifics may vary by region) Page Count Estimated Pages: 1500+ Manual Type Type: Factory Service Manual / Repair Manual Software Language Language: English Format Format: Software (likely digital PDF or proprietary program) 📖 Manual Coverage Systems Covered Powertrain: Engine mechanical, fuel system, ignition system, exhaust system, cooling system, lubrication system, engine control systems (ECU, sensors). Drivetrain: Manual transmission, automatic transmission, transaxle, differentials, axles, CV joints, driveshafts. Suspension Steering: Front suspension (MacPherson strut), rear suspension (multi-link), steering system (power steering, steering rack), wheel alignment specifications. Brakes: Front disc brakes (vented), rear disc brakes (solid or vented depending on model), ABS system (where applicable), brake fluid specifications, bleeding procedures. Electrical: 12V electrical system, battery, charging system (alternator), starting system (starter motor), lighting system, wipers, horn, power accessories, fuses, relays, wiring diagrams, diagnostic trouble codes (DTCs). HVAC: Heating, ventilation, and air conditioning (HVAC) system components, refrigerant type, service procedures. Body: Exterior body panels, interior trim, doors, windows, locks, glass, bumpers, body sealing, chassis specifications. Procedures Included Maintenance: Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt inspection and replacement, brake pad replacement, tire rotation. Troubleshooting: Diagnostic flowcharts, symptom-based troubleshooting guides for common issues (e.g., starting problems, rough idle, electrical faults). Repair: Engine component removal and installation (e.g., cylinder head, pistons, crankshaft), transmission overhaul, brake system repair, suspension component replacement, electrical component diagnosis and replacement. Diagnostics: On-board diagnostics (OBD-I), sensor testing, actuator testing, multimeter usage, oscilloscope interpretation for engine and electrical systems. Specifications Data: Torque specifications for all fasteners, critical clearances, diagnostic values, wiring schematics, component locations. Technical Depth Depth: Comprehensive, covering everything from basic scheduled maintenance to complete engine and transmission overhauls. Detailed diagnostic procedures for advanced troubleshooting. 📊 Manual Specifications File Format Format: Digital Software (likely searchable PDF or proprietary application) Print Quality Quality: High resolution, clear diagrams and text (typical for official service manuals). Binding Type Binding: N/A (Software format) Paper Type Type: N/A (Software format) Searchability Features: Likely includes keyword search functionality for quick access to specific information. ⚙️ Engine Specifications Primary Engine Engine Code Na Gs: 4G63 (SOHC, 16-valve) Engine Code Turbo Gsx: 4G63T (DOHC, 16-valve, turbocharged) Displacement Gs Na Displacement: 2.0 Liters (1997 cc) Gsx Turbo Displacement: 2.0 Liters (1997 cc) Performance Gs Na Horsepower: 135 hp @ 6000 rpm Gs Na Torque: 125 lb-ft @ 4500 rpm Gsx Turbo Horsepower: 195 hp @ 6000 rpm Gsx Turbo Torque: 203 lb-ft @ 3500 rpm Fuel System Fuel Delivery: Multi-point Fuel Injection (MPI) Fuel Type Required Fuel: Unleaded Regular (87 octane) for NA, Premium (91+ octane) for Turbocharged models recommended. Engine Management ECU Type: Proprietary Mitsubishi Engine Control Unit (ECU) 🔧 Transmission Standard Gs Transmission: 5-speed Manual Transmission Gsx Transmission: 5-speed Manual Transmission with All-Wheel Drive (AWD) Optional Gs Optional Transmission: 4-speed Automatic Transmission Gsx Optional Transmission: 4-speed Automatic Transmission with All-Wheel Drive (AWD) Features AWD System: Advanced All-Wheel Drive system with viscous coupling center differential on GSX models. Fluid Specifications Manual Transmission Fluid: API GL-4, SAE 75W-90 Gear Oil (refer to manual for specific part numbers). Automatic Transmission Fluid: Mitsubishi ATF-SP II or equivalent (refer to manual for specific part numbers). 📐 Dimensions Exterior Length: Approx. 170.3 inches (4325 mm) Width: Approx. 69.1 inches (1755 mm) Height: Approx. 50.0 inches (1270 mm) Wheelbase Wheelbase: Approx. 98.6 inches (2505 mm) Weights Curb Weight Gs FWD: Approx. 2900 lbs (1315 kg) Curb Weight Gsx AWD: Approx. 3200 lbs (1451 kg) 🛡️ Safety Features Ratings NHTSA Driver Side Frontal Impact: Not extensively rated under modern standards, but generally considered safe for its era. IIHS Ratings: Not available for this model year. Passive Features Airbags: Driver-side airbag standard on most models, passenger airbag optional or not available. Seat Belts: 3-point front seat belts, 2-point rear seat belts. Crumple Zones: Designed with front and rear crumple zones for energy absorption. Active Features ABS: Anti-lock Braking System (ABS) available as an option on some models (e.g., GSX). 💡 Technology Features Infotainment Audio System: Factory AM/FM stereo with cassette...