The 1991 Acura NSX Service Manual provides comprehensive technical information for the maintenance, repair, and service of the first-generation Acura NSX sports car. This manual covers the revolutionary mid-engine, rear-wheel-drive vehicle featuring a 3.0L V6 VTEC engine, aluminum monocoque chassis, double-wishbone suspension, and advanced electronic systems. Below are key sections for specifications, maintenance procedures, troubleshooting, and technical data.
Key specifications for the 1991 Acura NSX including dimensions, capacities, and performance data.
| Specification | Value |
|---|---|
| Engine Type | 3.0L DOHC 24-valve V6 VTEC |
| Horsepower | 270 hp @ 7100 rpm |
| Torque | 210 lb-ft @ 5300 rpm |
| Transmission | 5-speed manual or 4-speed automatic |
| Curb Weight | 3,010 lbs (manual) |
| 0-60 mph | 5.2 seconds |
| Top Speed | 168 mph |
| Fuel Capacity | 18.5 gallons |
| Wheelbase | 99.6 inches |
| Length | 174.2 inches |
Detailed service procedures for the C30A V6 VTEC engine and related systems.
WARNING! Always disconnect battery before working on electrical systems. Use proper lifting equipment for engine removal.
Service information for manual and automatic transmissions, clutch, and final drive.
CAUTION! Use only recommended transmission fluids. Properly support vehicle when working underneath.
Service procedures for the four-wheel disc brake system with ABS.
Front Brakes: 11.1-inch ventilated discs with 4-piston calipers. Rear Brakes: 11.1-inch ventilated discs with 2-piston calipers.
Brake Pad Replacement: Front and rear pad replacement procedures. Rotor Service: Inspection, machining, and replacement specifications. ABS System: Troubleshooting and component service. Brake Fluid: DOT 3 or DOT 4 fluid specifications and bleeding procedures.
Comprehensive electrical system diagnostics and repair procedures.
Tip: Always use factory service connectors and follow wiring diagrams precisely.
Aluminum body repair procedures and interior component service.
WARNING! Special procedures required for aluminum body repair. Use only approved methods and materials.
Recommended maintenance intervals and service procedures.
| Service Interval | Required Maintenance |
|---|---|
| 7,500 miles | Oil and filter change, tire rotation |
| 15,000 miles | All 7,500 mile services plus air filter, brake inspection |
| 30,000 miles | All 15,000 mile services plus coolant, transmission fluid |
| 60,000 miles | All 30,000 mile services plus timing belt, spark plugs |
| 90,000 miles | Major service including all fluids and filters |
Common problems and diagnostic procedures for the 1991 NSX.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Engine won't start | Fuel pump, ignition, battery | Check fuel pressure, spark, battery voltage |
| Poor acceleration | Clutch, fuel system, sensors | Test clutch engagement, fuel pressure, TPS |
| Brake vibration | Warped rotors, wheel balance | Inspect and machine rotors, balance wheels |
| Electrical issues | Ground connections, fuses | Check all grounds, test fuses and relays |
| Overheating | Coolant, thermostat, radiator | Check coolant level, thermostat operation |
Essential technical specifications and torque values.
Complete electrical schematics and connector locations.
Engine Control System: ECU pinouts and sensor wiring. Charging System: Alternator and regulator circuits. Lighting Systems: Headlight, taillight, and signal light wiring. ABS System: Anti-lock brake system electrical diagrams. Climate Control: A/C and heater control wiring.
Service Support: Contact Acura technical support for additional assistance. Refer to factory bulletins for updates.