🏷️ Basic Information

Make:

Mitsubishi

Model:

Eclipse

Generation:

1st Generation

Chassis Codes:

D22A, D27A, D32A, D38A, D31A

Engine Codes Gasoline:

4G63 (2.0L SOHC NA, 2.0L DOHC Turbo - including GST/GSX variants), 4G64 (2.4L SOHC NA)

Transmission Codes:

F5M33 (5-speed Manual), W4A32 (4-speed Automatic)

👋 Introduction

Market Segment:

Compact Sports Coupe/Convertible

Key Selling Points:

Affordable performance, distinctive styling, available all-wheel drive (GSX), turbocharged engine option (GS-T/GSX).

Primary Competitors:

Dodge Stealth, Mazda RX-7, Toyota Supra, Nissan 300ZX, Honda Prelude, Ford Probe, Chevrolet Camaro.

Design Philosophy:

Sleek, aerodynamic styling with a focus on performance driving dynamics. Offered in both coupe and convertible body styles.

Platform Shared With:

Eagle Talon, Plymouth Laser (Chrysler's Diamond-Star Motors joint venture).

📋 Manual Details

Vehicle Years Covered:

1990, 1991, 1992, 1993, 1994

Trim Levels Covered:

All, including base, RS, GS, GS-T (Turbo), GSX (Turbo AWD)

Estimated Page Count:

Hundreds (specific count not provided, typical factory manuals exceed 1000 pages)

Manual Type:

Workshop Service Repair Manual (Factory Original)

Language:

English

Format:

PDF Download

📖 Manual Coverage

Engine Mechanical:

Complete disassembly, inspection, repair, and reassembly of all engine components (pistons, rings, bearings, crankshaft, camshafts, valves, cylinder head, block, timing belt/chain, lubrication system, cooling system).

Engine Performance:

Fuel injection (EFI/MPI), ignition system (distributor, coil, plugs), emissions control, turbocharger system (wastegate, intercooler, boost control), diagnostics and troubleshooting for performance issues.

Transmission Manual:

Clutch system, gearbox disassembly, component replacement, gear ratios, torque specifications, linkage adjustment, lubrication.

Transmission Automatic:

Torque converter, valve body, planetary gears, hydraulic circuits, electronic control module (ECU) integration, shift solenoids, fluid specifications, troubleshooting, and repair.

Drivetrain AWD:

Front and rear differentials, transfer case, driveshafts, constant velocity (CV) joints, viscous coupling (if applicable), maintenance, fluid types, and repair procedures for AWD models (GSX).

Suspension And Steering:

Front and rear suspension (struts, springs, control arms, bushings), power steering system (pump, rack, lines), wheel alignment specifications, steering knuckle, and related components.

Brakes:

Front and rear brake systems (disc, caliper, rotor, pad replacement), parking brake, hydraulic system (master cylinder, brake lines, ABS components if equipped), bleeding procedures, and specifications.

Electrical System:

Battery, charging system (alternator), starting system (starter motor), ignition system components, lighting, wiring diagrams, fuse and relay identification, diagnostic connectors, body control modules, and ECU identification.

HVAC:

Air conditioning system (refrigerant types, compressor, condenser, evaporator, service), heating system, blower motor, climate controls, and troubleshooting.

Body And Interior:

Exterior panels (doors, hood, trunk, fenders), interior trim, seats, airbags (SRS system), safety restraints, glass replacement, door mechanisms, and body hardware.

Maintenance Procedures:

Oil changes, filter replacements (oil, air, fuel), coolant flushes, spark plug replacement, belt inspection and replacement, brake pad and rotor replacement, fluid level checks and top-offs.

Diagnostic Troubleshooting:

Step-by-step diagnostic flowcharts for common problems, symptom-based troubleshooting, fault code retrieval and interpretation (OBD-I).

Repair Procedures:

Detailed, illustrated instructions for component removal, installation, and adjustment for virtually all systems.

Engine Rebuild:

Comprehensive instructions for engine overhaul, including torque specifications, clearances, and component measurements.

Transmission Overhaul:

Detailed steps for rebuilding both manual and automatic transmissions.

Wiring Diagrams:

Complete, high-quality wiring schematics for all electrical systems, including power distribution, grounds, and component connections.

Depth Of Coverage:

Factory-level detail, suitable for professional technicians and advanced DIY mechanics. Covers everything from basic adjustments to complete component rebuilds and advanced diagnostics.

Diagnostic Tools:

Information on necessary special tools and equipment for repairs and diagnostics.

📊 Manual Specifications

File Format:

PDF

Print Quality:

High-resolution scans of original factory documentation, ensuring clarity of text and diagrams.

Searchability:

Searchable text within the PDF allows for quick access to specific topics.

Binding Type:

N/A (Digital Download)

Paper Type:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Displacement Base:

2.0 Liters

Engine Type Base:

4-Cylinder, SOHC, Naturally Aspirated

Horsepower Base:

Approximately 135-140 hp

Torque Base:

Approximately 125-130 lb-ft

Engine Displacement Turbo:

2.0 Liters

Engine Type Turbo:

4-Cylinder, DOHC, Turbocharged, Intercooled (4G63)

Horsepower Turbo:

Approximately 190-210 hp (depending on year and trim)

Torque Turbo:

Approximately 203-220 lb-ft (depending on year and trim)

Turbocharger System:

Mitsubishi TD05H-14B or similar turbocharger, air-to-air intercooler, electronic wastegate control.

Engine Displacement Optional:

2.4 Liters

Engine Type Optional:

4-Cylinder, SOHC, Naturally Aspirated (4G64)

Horsepower Optional:

Approximately 140-145 hp

Torque Optional:

Approximately 145-150 lb-ft

Fuel Induction:

Electronic Multi-Point Fuel Injection (MPI)

Fuel Type:

Unleaded Gasoline (Octane rating varies by engine, premium recommended for Turbo models)

🔧 Transmission

Standard Transmission:

5-Speed Manual

Optional Transmission:

4-Speed Automatic

Drivetrain Options:

Front-Wheel Drive (FWD), All-Wheel Drive (AWD) on GSX models.

AWD System Type:

Full-time 4-wheel drive with viscous coupling center differential (on some models).

📐 Dimensions

Length:

Approx. 172.4 inches

Width:

Approx. 69.1 inches

Height:

Approx. 50.2 inches (coupe)

Wheelbase:

Approx. 100.4 inches

Curb Weight FWD:

Approx. 2800-3000 lbs

Curb Weight AWD:

Approx. 3100-3300 lbs

🛡️ Safety Features

NHTSA Ratings:

Specific ratings for this era are generally not available in modern comparable formats. Focus was on basic crashworthiness.

Active Safety Features:

Anti-lock Braking System (ABS) available on higher trims (e.g., GSX, certain GS models).

Passive Safety Features:

Seat belts (front, and rear lap belts in coupe), reinforced safety cell, energy-absorbing steering column, available driver-side airbag (late models/specific trims).

Srs Airbag System:

Driver-side airbag became more common in later model years (1992-1994) and on higher trims.

💡 Technology Features

Infotainment Features:

Basic AM/FM radio with cassette player, optional CD player in later models. Manual climate controls.

Driver Assistance Features:

Limited by era. ABS was the primary advanced system available. No electronic stability control or advanced driver-assistance systems (ADAS) found in modern vehicles.

Connectivity Features:

No integrated Bluetooth or smartphone connectivity. Aftermarket head unit installation is common for modern audio upgrades.

🔧 Maintenance

Oil Change Interval:

Every 3,000-5,000 miles or 3-6 months, depending on driving conditions and oil type used. Refer to manual for exact specification.

Timing Belt Replacement:

Critical interval, typically every 60,000 miles or 4-5 years for the 4G63 and 4G64 engines. Failure can cause severe engine damage.

Transmission Fluid Change:

Automatic: Every 30,000-45,000 miles. Manual: Check level regularly, change if discolored or contaminated.

Engine Oil Type:

API SG or SH, SAE 5W-30 or 10W-30 recommended. Consult manual for precise viscosity based on climate.

Coolant Type:

Ethylene glycol based coolant, typically a 50/50 mix with distilled water. Consult manual for specific type (e.g., HOAT or OAT).

Transmission Fluid Automatic:

ATF SP-II, SP-III, or equivalent. Consult manual for exact specification.

Transmission Fluid Manual:

API GL-4, SAE 75W-90 or 75W-85 hypoid gear oil.

Differential Fluid AWD:

API GL-5, SAE 75W-90 hypoid gear oil for front and rear differentials and transfer case.

Common Problems Engine:

Timing belt failure if not replaced on schedule, head gasket leaks, oil leaks (valve cover, oil pan), turbocharger wear on high-mileage turbo models, radiator issues.

Common Problems Transmission:

Worn clutch components (manual), automatic transmission hesitation or rough shifting, transfer case seal leaks (AWD).

Common Problems Suspension:

Worn strut mounts, ball joints, control arm bushings, wheel bearing failures.

Common Problems Electrical:

Corroded ground points, alternator failure, power window regulator issues, HVAC blower motor resistors.

Maintenance Schedule Summary:

The manual provides a detailed schedule for all maintenance tasks, including intervals for engine tune-ups, brake inspections, fluid changes, and belt replacements, ensuring optimal performance and longevity.

📚 Vehicle History

Mitsubishi Performance Legacy:

Mitsubishi has a history of producing performance-oriented vehicles, notably rally cars (Lancer Evolution) and sports coupes.

First Generation Introduction:

Launched in 1990 as a replacement for the Mitsubishi Starion and contributing to the rise of affordable Japanese sports coupes.

Updates During Generation:

Minor styling tweaks and equipment updates occurred throughout the 1990-1994 model run, including revisions to headlights, taillights, and interior components.

Manufacturing Location:

Normal, Illinois, USA (Diamond-Star Motors plant)

🏆 Awards & Recognition

Automotive Press Awards:

Received positive reviews from automotive publications for its performance, handling, and styling, particularly the turbocharged AWD variants.