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Mitsubishi Eclipse 1990-1994 Workshop Service Repair Manual

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The Mitsubishi Eclipse, first generation, produced from 1990 to 1994, is a compact sports coupe and convertible celebrated for its affordable performance, distinctive styling, and the availability of potent turbocharged...
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Mitsubishi Eclipse 1990-1994 Workshop Service Repair ManualMitsubishi Eclipse 1990-1994 Workshop Service Repair ManualMitsubishi Eclipse 1990-1994 Workshop Service Repair ManualMitsubishi Eclipse 1990-1994 Workshop Service Repair Manual
The Mitsubishi Eclipse, first generation, produced from 1990 to 1994, is a compact sports coupe and convertible celebrated for its affordable performance, distinctive styling, and the availability of potent turbocharged engines with all-wheel drive. Sharing its platform with the Eagle Talon and Plymouth Laser, this model offered a compelling package, particularly the GS-T and GSX trims, which featured a turbocharged 2.0L DOHC engine (4G63) delivering up to 210 horsepower and an advanced all-wheel-drive system. With a focus on driving dynamics and sleek, aerodynamic design, the Eclipse established itself as a noteworthy contender in the sports coupe market of its era. This comprehensive workshop service repair manual provides in-depth guidance for the maintenance, repair, and troubleshooting of the Mitsubishi Eclipse (1990-1994), covering all trims including base, RS, GS, GS-T, and GSX. It details essential procedures for engine mechanicals, fuel and ignition systems, manual and automatic transmissions, drivetrain components (including AWD), suspension, steering, brakes, and the complete electrical system. The manual also includes HVAC, body, and interior repair instructions, along with critical maintenance schedules, fluid specifications, and diagnostic flowcharts, making it an indispensable resource for owners and technicians alike.
🏷️ Basic Information
Identification
Make:
Mitsubishi
Model:
Eclipse
Generation:
1st Generation
Chassis Codes:
D22A, D27A, D32A, D38A, D31A
Codes
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 Position
Market Segment:
Compact Sports Coupe/Convertible
Key Selling Points:
Affordable performance, distinctive styling, available all-wheel drive (GSX), turbocharged engine option (GS-T/GSX).
Competitive Analysis
Primary Competitors:
Dodge Stealth, Mazda RX-7, Toyota Supra, Nissan 300ZX, Honda Prelude, Ford Probe, Chevrolet Camaro.
Key Features
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
Coverage Areas
Vehicle Years Covered:
1990, 1991, 1992, 1993, 1994
Trim Levels Covered:
All, including base, RS, GS, GS-T (Turbo), GSX (Turbo AWD)
Page Count
Estimated Page Count:
Hundreds (specific count not provided, typical factory manuals exceed 1000 pages)
Manual Type
Manual Type:
Workshop Service Repair Manual (Factory Original)
Language
Language:
English
Format
Format:
PDF Download
📖 Manual Coverage
Systems Covered
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.
Procedures Included
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.
Technical Depth
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
File Format:
PDF
Print Quality
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
Binding Type:
N/A (Digital Download)
Paper Type
Paper Type:
N/A (Digital Download)
⚙️ Engine Specifications
Primary Engine
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
Performance Engine
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.
Optional Engine
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 System
Fuel Induction:
Electronic Multi-Point Fuel Injection (MPI)
Fuel Type:
Unleaded Gasoline (Octane rating varies by engine, premium recommended for Turbo models)
🔧 Transmission
Standard
Standard Transmission:
5-Speed Manual
Optional
Optional Transmission:
4-Speed Automatic
Features
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
Exterior
Length:
Approx. 172.4 inches
Width:
Approx. 69.1 inches
Height:
Approx. 50.2 inches (coupe)
Wheelbase:
Approx. 100.4 inches
Weights
Curb Weight FWD:
Approx. 2800-3000 lbs
Curb Weight AWD:
Approx. 3100-3300 lbs
🛡️ Safety Features
Ratings
NHTSA Ratings:
Specific ratings for this era are generally not available in modern comparable formats. Focus was on basic crashworthiness.
Active Features
Active Safety Features:
Anti-lock Braking System (ABS) available on higher trims (e.g., GSX, certain GS models).
Passive Features
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
Infotainment Features:
Basic AM/FM radio with cassette player, optional CD player in later models. Manual climate controls.
Driver Assistance
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
Connectivity Features:
No integrated Bluetooth or smartphone connectivity. Aftermarket head unit installation is common for modern audio upgrades.
🔧 Maintenance
Service Intervals
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.
Fluid Specifications
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.
Known Issues
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
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
Brand Heritage
Mitsubishi Performance Legacy:
Mitsubishi has a history of producing performance-oriented vehicles, notably rally cars (Lancer Evolution) and sports coupes.
Model Evolution
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.
Production
Manufacturing Location:
Normal, Illinois, USA (Diamond-Star Motors plant)
🏆 Awards & Recognition
Recognitions
Automotive Press Awards:
Received positive reviews from automotive publications for its performance, handling, and styling, particularly the turbocharged AWD variants.
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