1990 Mazda Miata Workshop & Service Repair Manual

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🏷️ Basic Information Identification Make: Mazda Model: Miata Year: 1990 Generation Generation Name: First Generation (NA) Generation Years: 1989-1997 👋 Introduction Market Position Vehicle Segment: Lightweight, affordable sports car (Roadster/Convertible)...

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Type: Car

Vendor:

Sku: 395214

Tags: 1990 Car Cars Mazda Miata

Product variants

Description

🏷️ Basic Information

Identification

Make:

Mazda

Model:

Miata

Year:

Generation

Generation Name:

First Generation (NA)

Generation Years:

1989-1997

👋 Introduction

Market Position

Vehicle Segment:

Lightweight, affordable sports car (Roadster/Convertible)

Target Audience:

Enthusiasts seeking a pure driving experience, affordable sports car ownership.

Competitive Analysis

Key Competitors:

Lotus Elan, Triumph TR7 (historically), later models competed with Chevrolet Camaro/Pontiac Firebird Convertibles, Ford Mustang Convertible.

Key Features

Design Philosophy:

Jinba Ittai (horse and rider as one) - driver-centric, balanced handling, lightweight construction.

Powertrain Layout:

Front-engine, rear-wheel-drive (RWD)

Body Style:

Two-door convertible

Manual Benefit Diy:

Empowers owners to perform their own maintenance and repairs, fostering a deeper connection with their vehicle and saving costs.

📋 Manual Details

Coverage Areas

Manual Type:

Workshop & Service Repair Manual

Language:

English

Format:

PDF Download

Compatibility:

All Versions of Windows & Mac

Requirements:

Adobe PDF Reader

📖 Manual Coverage

Systems Covered

Engine Service:

Detailed troubleshooting, repair, and overhaul procedures for the 1.6L DOHC engine.

Transmission Service:

Procedures for both the 5-speed manual and optional 4-speed automatic transmissions.

Brake System:

Inspection, maintenance, and repair of front disc and rear drum brakes, including ABS if equipped.

Electrical System:

Comprehensive coverage of wiring diagrams, component testing, and diagnostic procedures for all electrical systems.

Suspension And Steering:

Maintenance and repair of the double wishbone suspension, steering rack, and related components.

Cooling System:

Service procedures for the radiator, water pump, thermostat, and cooling fan.

Fuel Injection System:

Detailed information on the electronic fuel injection (EFI) system, including fuel pump, injectors, and sensors.

Emission Control System:

Diagnosis and repair of emission control devices and related systems.

Chassis And Body:

Body panel alignment, repair procedures, and chassis maintenance.

Restraint System:

Information on seatbelts and airbags (if applicable to the specific 1990 model, though airbags were less common).

Interior Components:

Service and repair procedures for interior trim, seats, and dashboard components.

Differential And Drive Axle:

Maintenance and repair of the rear differential and drive axles.

Heater And Air Conditioning:

Service procedures for the HVAC system.

Engine Control System:

Diagnosis and troubleshooting of the Engine Control Unit (ECU) and related sensors.

Procedures Included

General Maintenance:

Oil changes, fluid checks, filter replacements, tire rotation, and general inspection procedures.

Troubleshooting:

Systematic diagnostic steps for identifying and resolving common and uncommon vehicle issues.

Engine Repair:

Detailed instructions for engine assembly/disassembly, cylinder head service, piston and connecting rod replacement, and crankshaft service.

Transmission Repair:

Transmission overhaul, clutch replacement, and gear selection mechanism repair.

Brake System Repair:

Brake pad/shoe replacement, caliper/wheel cylinder overhaul, brake line repair, and bleeding procedures.

Electrical Troubleshooting:

Testing of electrical components, circuits, and use of diagnostic tools.

Suspension And Steering Repair:

Replacement of ball joints, tie rod ends, shock absorbers, springs, and wheel bearings.

Fuel System Service:

Fuel injector cleaning, fuel filter replacement, fuel pressure testing, and fuel pump service.

Wiring Diagram Interpretation:

Guidance on understanding and utilizing the detailed wiring schematics for electrical diagnostics.

Technical Depth

Depth Level:

Comprehensive (DIY to Professional Shop Level)

Diagnostic Capability:

Advanced diagnostic procedures and troubleshooting trees for all major systems.

Repair Complexity:

Covers routine maintenance to major component overhauls and rebuilds.

Special Tools:

Identification of necessary specialized tools and equipment for specific repairs.

📊 Manual Specifications

File Format

File Type:

Searchability:

Likely searchable text within the PDF for quick information retrieval.

Printability:

Printable pages for hands-on use in a workshop environment.

Print Quality

Image Resolution:

High-resolution diagrams and images for clarity.

Binding Type

Binding:

N/A (Digital Download)

Paper Type

Paper Type:

N/A (Digital Download)

⚙️ Engine Specifications

Primary Engine

Engine Code:

Engine Type:

Inline 4-cylinder, DOHC (Dual Overhead Camshafts)

Displacement:

1.6 Liters (1597 cc)

Bore X Stroke:

78.0 mm x 83.6 mm

Compression Ratio:

9.4:1

Performance

Horsepower:

115 hp @ 6500 RPM (U.S. Spec)

Torque:

100 lb-ft @ 5000 RPM (U.S. Spec)

Fuel System

Fuel Delivery:

Electronic Fuel Injection (EFI)

Fuel Type:

Unleaded Gasoline (87 Octane Minimum Recommended)

Fuel Pump Type:

In-tank Electric

🔧 Transmission

Standard

Type:

5-Speed Manual Transmission

Clutch Type:

Hydraulic, Single Dry Plate

Optional

Type:

4-Speed Automatic Transmission

Features

Transmission Fluid Spec:

API GL-5, SAE 75W-90 (Manual); Dexron III (Automatic)

📐 Dimensions

Exterior

Length:

3915 mm (154.1 inches)

Width:

1675 mm (65.9 inches)

Height:

1235 mm (48.6 inches) (Soft Top Up)

Wheelbase:

2265 mm (89.2 inches)

Front Track:

1420 mm (55.9 inches)

Rear Track:

1430 mm (56.3 inches)

Weights

Curb Weight:

950-980 kg (2094-2160 lbs) approx.

Gross Vehicle Weight Rating:

Approximately 1200 kg (2645 lbs)

Cargo

Trunk Volume:

150 Liters (5.3 cubic feet) approx.

🛡️ Safety Features

Ratings

NHTSA Driver Front Impact:

Not rated in modern terms, but known for its robust chassis design for its class.

Passive Features

Seat Belts:

3-point retractable seatbelts.

Rollover Protection:

Reinforced A-pillar and pop-up roll bar behind the seats (distinctive feature of the NA generation).

💡 Technology Features

Infotainment

Audio System:

Factory AM/FM stereo with cassette player, typically 4-speaker setup. Optional CD player available on some later models or trims.

Driver Assistance

Traction Control:

Not standard on the 1990 model, may have been a rare dealer option or aftermarket addition.

Connectivity

Bluetooth Usb:

Not available on the 1990 model.

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 5,000 miles or 6 months, whichever comes first (using conventional oil).

Transmission Fluid Change Interval:

Every 30,000-50,000 miles (Manual); Every 30,000 miles (Automatic).

Coolant Change Interval:

Every 2 years or 30,000 miles.

Fluid Specifications

Engine Oil Type And Capacity:

API SG or SH, SAE 10W-30 (4.2 US quarts with filter).

Coolant Type:

Mazda Genuine Super Long Life Coolant or equivalent ethylene glycol-based coolant (50/50 mix with distilled water).

Brake Fluid Type:

DOT 3 or DOT 4

Known Issues

Common Wear Items:

Clutch wear, radiator leaks, window motor failures, subframe rust (especially in certain climates), O2 sensor issues.

Engine Management:

Potential for MAF sensor or TPS issues leading to rough idle or poor performance.

Rust Prone Areas:

Rocker panels, rear quarter panels, sills, and subframes are susceptible to rust.

📚 Vehicle History

Brand Heritage

Mazda Philosophy:

Mazda's reputation for building reliable, driver-focused vehicles with innovative technology.

Model Evolution

Miata Concept:

Revival of the affordable, lightweight British roadster concept, adapted for modern reliability and usability.

Design Influences:

Inspired by classic sports cars like the Lotus Elan and Alfa Romeo Spider.

Production

Production Start Year:

Manufacturing Plant:

Hofushima, Japan

🏆 Awards & Recognition

Recognitions

Car And Driver 10Best:

Named to Car and Driver's 10Best list multiple times during its first generation.

Motor Trend Car Of The Year Contender:

Often cited as a significant contender for automotive awards due to its impact and driving dynamics.