🏷️ Basic Information

Make:

Mazda

Model:

RX-7

Year:

1994

Chassis Code:

FD3S

Engine Code:

13B-REW

👋 Introduction

Positioning:

The 1994 Mazda RX-7 (FD generation) represented the pinnacle of rotary engine sports car performance and design for its era, competing with high-performance European and American sports cars. This manual is essential for owners and technicians seeking to maintain and repair this iconic vehicle.

Competition:

Competed with cars like the Toyota Supra, Nissan 300ZX, Porsche 968, Chevrolet Corvette.

Features:

Twin-turbocharged rotary engine, advanced chassis dynamics, distinctive styling, driver-focused cockpit.

📋 Manual Details

Coverage:

General Information, Special Tools, Maintenance, Engine, Cooling System, Fuel System, Emissions Control, Transmission, Transaxle, Steering System, Suspension System, Brake System (including ABS), Body Construction, Heater and Air Conditioning, Electrical System (including SRS Airbag), Troubleshooting, Wiring Diagrams, Technical Specifications.

Pages:

Approximately 1800+

Type:

Factory Service Manual / Workshop Repair Manual

Language:

English

Format:

Printed

📖 Manual Coverage

Covered Systems:

Engine mechanical, engine management (ECU), lubrication, ignition, fuel delivery, emission control systems (air injection, EGR, catalytic converter), cooling system, exhaust system, manual transmission, automatic transmission (if applicable for specific trims), differential, driveshafts, steering gear, power steering, front suspension, rear suspension, wheel alignment, brake system hydraulics, ABS control system, parking brake, body panels, interior trim, exterior trim, HVAC system operation and components, electrical circuits, lighting, audio system, power accessories, airbags (SRS), diagnostics, troubleshooting.

Included Procedures:

Routine maintenance (oil changes, filter replacements, tune-ups), engine overhaul and component replacement (rotary apex seals, rotors, housings, oil metering pump), transmission removal/installation and repair, clutch service, differential service, suspension component replacement (bushings, ball joints, shocks), brake system servicing (pad/rotor replacement, caliper overhaul, ABS bleeding), HVAC system diagnostics and repair, electrical system troubleshooting, wiring harness repair, body panel alignment and repair, interior component removal and installation, diagnostic trouble code (DTC) retrieval and interpretation, emissions system component testing and adjustment, torque specifications, special tool usage, diagnostic flowcharts.

Depth:

Comprehensive, from basic maintenance to complete engine and transmission rebuilds. Detailed diagnostic procedures, electrical schematics, and component testing methods.

📊 Manual Specifications

Format:

Printed, bound

Quality:

Original factory print quality, clear diagrams and text

Binding:

Stapled or bound, designed for workshop use

Paper:

Durable, often glossy or semi-gloss paper for diagrams

⚙️ Engine Specifications

Engine:

13B-REW Twin-Rotary, naturally aspirated (less common)

Horsepower:

255 hp @ 6500 rpm (Twin-Turbo)

Torque:

217 lb-ft @ 5000 rpm (Twin-Turbo)

Fuel Injection:

Electronic Fuel Injection (EFI) with Sequential Twin Turbochargers

Apex Seals:

Requires specific inspection and replacement procedures for longevity.

Oil Metering Pump:

Integrated OMP for two-stroke lubrication of apex seals and other friction points.

🔧 Transmission

Type:

R154 5-speed manual transmission

Type:

Heli-Shift 4-speed automatic transmission (less common, primarily for early models or specific markets)

Clutch:

Hydraulically actuated single-plate dry clutch

📐 Dimensions

Wheelbase:

95.5 inches (2425 mm)

Length:

167.9 inches (4265 mm)

Width:

69.1 inches (1755 mm)

Height:

48.2 inches (1225 mm)

Curb Weight:

Approx. 3000-3200 lbs (1360-1450 kg)

🛡️ Safety Features

Airbag System:

Equipped with SRS (Supplemental Restraint System) airbags (driver and passenger).

ABS:

Anti-lock Braking System (ABS) standard on most models.

Body Structure:

Designed with a strong unibody structure for occupant protection.

💡 Technology Features

Audio System:

Factory AM/FM stereo with cassette player, often Bose or premium sound system options.

Traction Control:

Traction Control System (TCS) was an available option on some models.

Diagnostics:

OBD-I diagnostic system with proprietary Mazda diagnostic connector.

🔧 Maintenance

Oil Change:

Every 3,000 - 5,000 miles (5,000 - 8,000 km) or 3-6 months, depending on driving conditions. Use of a high-quality synthetic oil is recommended.

Spark Plugs:

Typically replaced every 30,000 - 60,000 miles, depending on type (standard, platinum, or iridium).

Timing Belt:

N/A (Rotary engines do not use a timing belt; they use a timing chain and rotor phasing.

Engine Oil:

API SG or SH, SAE 10W-30 or 10W-40 recommended. Check owner's manual for specific viscosity based on temperature. High-performance synthetic oil is advised.

Transmission Fluid:

Manual: GL-4 or GL-5 gear oil, SAE 75W-90 or 80W-90. Automatic: Mazda ATF-III or equivalent.

Coolant:

Mazda Long Life Coolant (Blue) or equivalent ethylene glycol-based antifreeze mixed 50/50 with distilled water.

Brake Fluid:

DOT 3 or DOT 4 brake fluid.

Rotary Engine:

Apex seal wear, carbon build-up in ports, oil seal degradation, vacuum hose deterioration, turbocharger failure, coolant seal failure (leading to over-heating).

Vacuum System:

Extensive vacuum hose network prone to cracking and leaks, affecting engine performance and fuel economy.

Fuel System:

Clogged fuel injectors, faulty fuel pressure regulator, aging fuel pumps.

Electrical:

Corroded grounds, failing alternator, worn wiring harnesses, intermittent ECU issues.

📚 Vehicle History

Heritage:

Mazda has a long history of rotary engine innovation, dating back to the Cosmo. The RX-7 is its flagship sports car model.

Generations:

The 1994 model is part of the third generation (FD) RX-7, launched in 1992 (Japan) and 1993 (North America). It featured a complete redesign and advancements over the FC generation.

Production Years:

1992-2002 (FD generation)

📄 Technical Specifications

Engine Type:

13B-REW Twin-Rotor Wankel with Sequential Turbocharging

Displacement:

1.3L (1308 cc)

Bore Stroke Rotary:

100mm x 84mm (per rotor)

Compression Ratio:

9.0:1

Ignition Timing:

Refer to manual for specific base timing and advance curves based on RPM and load.

Gear Ratios Manual:

1st: 3.483, 2nd: 2.015, 3rd: 1.310, 4th: 1.000, 5th: 0.764, Reverse: 3.115

Final Drive Ratio:

4.300

Front Brakes:

11.9-inch (303 mm) Ventilated Discs

Rear Brakes:

11.3-inch (286 mm) Ventilated Discs

Wheel Bolt Pattern:

5x114.3 mm (5x4.5 inches)

Standard Tire Size:

Front: 225/50R16, Rear: 245/45R16 (check specific trim/options)

Fuel Tank Capacity:

17.2 US gallons (65 Liters)

Battery:

12V, 46B24L or similar designation.

Coolant Capacity:

Approx. 7.0 US quarts (6.6 Liters)