🏷️ Basic Information Identification Make: Honda Model: CR-X Model Variant: Civic CR-X Year: 1991 Codes Chassis Code: EF8 (Si), EF7 (VX/EX) 👋 Introduction Market Position Segment: Subcompact Sport Compact Competitive Analysis Key Competitors: Toyota MR2, Mazda RX-7 (early models), Nissan Pulsar GTi-R (in some markets) Key Features Design Philosophy: Lightweight, aerodynamic, driver-focused sport coupe Performance Focus: Nimble handling, fuel efficiency, sporty driving dynamics 📋 Manual Details Coverage Areas Coverage Level: Comprehensive Service and Repair Page Count Estimated Pages: 1000+ Manual Type Type: Factory Service Manual (FSM) Language Language: English Format Format: Digital (PDF) Searchability: Yes (Keyword searchable text) Printability: Yes (Printable pages) Quality: High-resolution scans of original factory documentation 📖 Manual Coverage Systems Covered Engine Mechanical: Yes (Diagnosis, disassembly, assembly, overhaul) Engine Management: Yes (Fuel injection, ignition, emissions control, ECU diagnostics) Transmission Manual: Yes (Diagnosis, overhaul, clutch system) Transmission Automatic: N/A (Manual transmission only for this model variant) Drivetrain: Yes (FWD axle shafts, differential) Suspension: Yes (Front MacPherson strut, rear multi-link, alignment) Steering: Yes (Rack and pinion, power steering system - if equipped) Brakes: Yes (Front disc, rear drum/disc, ABS - if equipped, hydraulic system) Electrical System: Yes (Wiring diagrams, charging system, starting system, lighting, accessories) HVAC: Yes (Air conditioning, heating, ventilation) Body Interior: Yes (Body panel removal/installation, interior trim, seats) Body Exterior: Yes (Bumpers, fenders, doors, hood, trunk lid) Procedures Included Maintenance: Yes (Scheduled maintenance, fluid changes, filter replacements) Troubleshooting: Yes (Diagnostic charts, symptom-based troubleshooting) Repair: Yes (Component replacement, system repairs, rebuild procedures) Diagnostics: Yes (OBD-I codes, sensor testing, actuator testing) Specifications: Yes (Torque values, clearances, tolerances) Wiring Diagrams: Yes (Detailed schematics for all systems) Technical Depth Depth: Expert (Suitable for professional mechanics and advanced DIYers) ⚙️ Engine Specifications Primary Engine Engine Code Usdm: D16A6 (1.6L SOHC VTEC) Engine Code Jdm: B16A (1.6L DOHC VTEC - SiR), D15B (1.5L SOHC - VX/EX) Performance Horsepower D16A6: 108 hp @ 6000 rpm Torque D16A6: 100 lb-ft @ 4500 rpm Horsepower B16A: 160 hp @ 7600 rpm Torque B16A: 111 lb-ft @ 7000 rpm Fuel System Induction: Multi-point Fuel Injection (PGM-FI) Fuel Type: Unleaded gasoline Engine Mechanical Bore X Stroke D16A6: 81.0 mm x 77.0 mm Compression Ratio D16A6: 9.5:1 Bore X Stroke B16A: 81.0 mm x 77.3 mm Compression Ratio B16A: 10.2:1 🔧 Transmission Standard Transmission Type: 5-speed Manual Optional Transmission Type: N/A (No Automatic option for this generation CR-X) Features Gear Ratios 5Spd: Detailed ratios available in manual (specific to engine variant) Clutch Type: Hydraulically actuated diaphragm spring clutch 📐 Dimensions Exterior Length: 159.5 in (4051 mm) Width: 66.7 in (1694 mm) Height: 49.6 in (1260 mm) Wheelbase: 93.3 in (2370 mm) Weights Curb Weight: Approx. 2100-2400 lbs (953-1089 kg) depending on trim Gross Vehicle Weight Rating: Available in manual 🛡️ Safety Features Ratings NHTSA Ratings 1991: Not readily available for this model year/segment in a comparable format to modern standards Active Features ABS: Optional on some higher trims (e.g., Si) Passive Features Airbags: Driver-side airbag standard on some later models; not standard across all 1991 models. Seatbelts: 3-point front seatbelts 💡 Technology Features Infotainment Audio System: Factory AM/FM Cassette player, optional CD player on some trims Instrumentation: Analog gauges (tachometer, speedometer, fuel, temp), warning lights Driver Assistance Cruise Control: Optional on some trims Connectivity Diagnostics Port: OBD-I (On-Board Diagnostics, First Generation) with a specific Honda 3-pin or 5-pin connector, requiring specialized tools or jumpers for code retrieval. 🔧 Maintenance Service Intervals Oil Change: Every 3,000-5,000 miles or 6 months (refer to manual for specific grade and interval) Air Filter Replacement: 15,000-30,000 miles or as needed based on conditions Spark Plugs: 30,000-60,000 miles (depending on type) Timing Belt: Critical: 60,000-90,000 miles or 7 years (refer to manual for specific replacement interval, interference engine) Fluid Specifications Engine Oil Type: API SG, SAE 5W-30 or 10W-30 (check manual for exact recommendations) Engine Oil Capacity: Approx. 3.7 US quarts (3.5 Liters) with filter change Coolant Type: Honda Type 2 Coolant or equivalent ethylene glycol-based antifreeze Brake Fluid Type: DOT 3 or DOT 4 Transmission Fluid Type: Honda Manual Transmission Fluid (MTF) or API GL-4 SAE 75W-90 gear oil Known Issues Timing Belt Wear: Common failure point if not replaced at recommended intervals, leading to catastrophic engine damage (interference engine) Bseries Engine Mounts: Can degrade over time, leading to vibration and poor engine support Ef Chassis Rust: Susceptible to rust in wheel wells, rocker panels, and around the sunroof (if equipped) Fuel Injector Clogging: Can occur with age and fuel quality, affecting performance and emissions Heater Core Leaks: Can develop leaks, affecting cabin heating and potentially causing fogging Window Regulator Failure: Manual window regulators can become stiff or fail with age Accelerator Cable Stretch: Can lead to a slack throttle pedal 📚 Vehicle History Brand Heritage Honda Philosophy: Focus on engineering, reliability, and sporty driving (e.g., S800, Civic performance models) Model Evolution Generation: Second...