🏷️ Basic Information

Make:

Isuzu

Model:

Impulse

Year:

1992

Generation Designation:

Second Generation (JP1)

Chassis Code:

JT221F

👋 Introduction

Market Position:

The 1992 Isuzu Impulse (also known as the Piazza in some markets) was positioned as a stylish, compact sports coupe, competing with vehicles like the Mazda MX-3, Toyota Celica, and Mitsubishi Eclipse. It appealed to buyers looking for a more unique and performance-oriented option in the entry-level sporty coupe segment.

Competitive Analysis:

While not achieving the sales volumes of some competitors, the Impulse offered distinct styling, a reliable Japanese drivetrain, and available all-wheel-drive (AWD) on certain models, providing a niche appeal. This manual provides the necessary technical data to maintain and repair this distinctive vehicle, which is often overlooked by general repair shops.

Key Features:

Licensed OE information from RepairSurge, accessible online across multiple devices, year-long access with renewal options, covers a wide range of repair and maintenance tasks, ideal for DIY enthusiasts and professional mechanics.

📋 Manual Details

Manual Coverage Areas:

Engine, Drivetrain, Brakes, Suspension, Steering, Electrical Systems, HVAC, Bodywork, Troubleshooting

Manual Page Count:

Online Access (Estimated 1000+ pages equivalent of factory documentation)

Manual Type:

Service and Repair Manual Software

Manual Language:

English

Manual Format:

Web-based Software (Accessible via browser)

📖 Manual Coverage

Systems Covered:

Engine Mechanical, Engine Control Systems (ECU), Fuel System, Ignition System, Cooling System, Lubrication System, Exhaust System, Drivetrain (FWD/AWD), Clutch, Transmission (Manual/Automatic), Differentials, Axles, Suspension (Front/Rear), Steering System, Brake System (Front Disc/Rear Disc), ABS (if equipped), Electrical Distribution System, Lighting, Instrumentation, Wiper/Washer Systems, Power Accessories, HVAC (Heating, Ventilation, Air Conditioning), Body & Chassis Components, Interior Trim, Exterior Trim, Diagnostic Procedures

Procedures Included:

Routine Maintenance (Oil Changes, Filter Replacements, Spark Plugs), Component Inspection and Testing, Removal and Installation Procedures, Diagnostic Flowcharts, Troubleshooting Guides, Repair Procedures, Overhaul Procedures, Wiring Diagrams, Torque Specifications, Fluid Capacities and Specifications, Emission Control System Servicing, Wheel Alignment Specifications

Technical Depth:

Comprehensive, from basic owner maintenance to advanced engine and transmission overhauls. Includes diagnostic procedures and troubleshooting for complex electrical and mechanical issues.

📊 Manual Specifications

File Format:

N/A (Web-based Access)

Print Quality:

N/A (Digital Display)

Binding Type:

N/A (Digital Access)

Paper Type:

N/A (Digital Access)

⚙️ Engine Specifications

Primary Engine Code:

G200Z

Engine Type:

Inline 4-cylinder, DOHC

Displacement:

1.998 liters (1998 cc)

Bore X Stroke:

84.0 mm x 90.0 mm

Compression Ratio:

9.2:1

Horsepower:

130 hp @ 6000 rpm (approx.)

Torque:

123 lb-ft @ 4000 rpm (approx.)

Fuel Delivery:

Electronic Fuel Injection (EFI)

Fuel Type:

Unleaded Gasoline

Engine Management:

ECU controlled ignition and fuel injection

Timing Belt Interval:

Refer to manual for specific mileage/time interval (typically 60,000 miles or 5 years)

🔧 Transmission

Standard Transmission Type:

5-Speed Manual

Optional Transmission Type:

4-Speed Automatic

Drivetrain Options:

Front-Wheel Drive (FWD), All-Wheel Drive (AWD - on specific trims)

Manual Transmission Fluid:

API GL-4, SAE 75W-90 (check manual for specific viscosity)

Automatic Transmission Fluid:

Dexron II or equivalent

📐 Dimensions

Length:

167.7 inches (4259 mm)

Width:

67.7 inches (1720 mm)

Height:

49.8 inches (1265 mm)

Wheelbase:

98.4 inches (2499 mm)

Curb Weight:

Approx. 2600-2800 lbs (1180-1270 kg), depending on configuration

Gross Vehicle Weight Rating:

Refer to VIN plate for specific GVWR

🛡️ Safety Features

NHTSA Front Impact Rating:

Not specifically rated by NHTSA for this model year in the same format as modern vehicles. Consult historical safety reports for comparable vehicles of the era.

Active Safety Features:

Optional Anti-lock Braking System (ABS)

Passive Safety Features:

Seat belts, crumple zones, reinforced passenger compartment

Front Brakes:

Ventilated Disc

Rear Brakes:

Disc

💡 Technology Features

Infotainment System:

Aftermarket head unit typically replaced original radio/cassette player. Original systems offered analog tuning and basic cassette playback.

Driver Assistance Features:

Limited to ABS on select models. No modern driver-assistance technologies (e.g., adaptive cruise control, lane keeping assist).

Connectivity Features:

N/A (No factory connectivity options beyond radio/cassette).

🔧 Maintenance

Oil Change Interval:

Every 3,750 miles or 3 months (using conventional oil), or 7,500 miles or 6 months (using synthetic oil, check manual for approval)

Air Filter Replacement:

Every 15,000 miles or 12 months

Spark Plug Replacement:

Every 30,000 miles

Coolant Flush:

Every 30,000 miles or 24 months

Engine Oil Specification:

API SG, ACEA A2/B2, SAE 5W-30 or 10W-30 (ambient temperature dependent, check manual)

Engine Oil Capacity:

4.5 US Quarts (4.3 Liters) with filter change

Coolant Type:

Isuzu Long Life Coolant or equivalent (50/50 mix with distilled water)

Brake Fluid:

DOT 3

Known Issues Common:

Timing belt failure (if not replaced on schedule), electrical gremlins, worn suspension bushings, premature brake wear, occasional fuel injector clogging.

Front Tire Size:

195/60R14 (common)

Rear Tire Size:

195/60R14 (common)

Wheel Bolt Pattern:

4x100 mm

Wheel Offset:

ET 40-45 (typical)

📚 Vehicle History

Brand Heritage:

Isuzu Motors Ltd. is a Japanese automobile manufacturer with a long history, initially known for commercial vehicles and diesel engines before diversifying into passenger cars. Isuzu has a reputation for robust engineering, particularly in its diesel powertrain offerings.

Model Evolution:

The Isuzu Impulse (internally designated PASP - Personal Activity Sports) was first introduced in 1981. The second generation, launched in 1991, featured a more aerodynamic and contemporary design, sharing its platform with the GEO Storm in North America. It offered a more refined driving experience and improved technology over its predecessor.

Production Period:

Second Generation: 1991-1993 (North America)

Manufacturing Location:

Japan

🏆 Awards & Recognition

Recognitions:

While the 1992 Isuzu Impulse itself did not win specific major awards, its platform was shared with the GEO Storm, which received moderate reviews for its styling and value proposition in the late 80s/early 90s compact sports car market. The manual's value lies in its technical accuracy for maintaining such a vehicle.