Vehicle Segment:
Luxury Grand Tourer (GT)
Target Demographic:
Affluent individuals seeking performance, comfort, and distinctive styling.
Primary Competitors Era:
Ferrari 308/328, Maserati Quattroporte, Aston Martin V8 Vantage, Chevrolet Corvette (C3/C4)
Unique Selling Points:
Front-engine, rear-wheel-drive V8 GT with advanced technology for its era; distinctive transaxle design.
Manual Value Proposition:
Enables owners and technicians to efficiently diagnose and repair complex electrical issues, saving significant labor costs and downtime.
Primary Focus:
Electrical System Troubleshooting and Repair
Included Diagrams:
Comprehensive Current Flow Diagrams for all electrical systems
Estimated Pages:
Varies by specific edition, typically 50-150 pages for this type of specialized manual.
Type:
Specialized Service Manual / Electrical Troubleshooting Guide
Format:
Likely printed manual (as indicated by 'manual what will be send to you'). Could also be available as a high-quality PDF.
Engine Management:
Fuel Injection, Ignition System, Engine Control Unit (ECU) wiring
Lighting:
Headlights, Taillights, Interior Lights, Fog Lights
Instrumentation:
Dashboard Gauges, Warning Lights, Speedometer, Tachometer, Fuel Level, Oil Pressure
Comfort And Convenience:
Power Windows, Power Seats, Sunroof, Climate Control (HVAC), Central Locking, Power Mirrors
Audio System:
Factory Radio/Cassette Player, Speaker Wiring, Antenna System
Charging System:
Alternator, Battery, Starter Motor
Wiper And Washer:
Wiper Motor, Washer Pump, Controls
Cruise Control:
System Components and Wiring
Safety Systems:
Horn, Hazard Lights
Troubleshooting:
Systematic diagnosis of electrical faults using diagrams
Component Testing:
Guidance on testing individual electrical components
Wiring Repair:
Methods for repairing damaged wiring harnesses and connections
Fuse And Relay Diagnosis:
Identification and testing of fuses and relays
Depth:
Advanced diagnostics and component-level repair instructions
Target Audience:
Professional mechanics and technically inclined DIY enthusiasts
Readability:
Designed to be understood with basic electronic knowledge, supported by clear illustrations and diagrams.
Digital Format:
PDF (Assumed for modern sales, but could be physical)
Print Quality:
High-resolution for clear visibility of diagrams and text (if printed)
Binding:
Staple-bound or perfect-bound (if printed)
Paper Quality:
Durable paper stock suitable for workshop use (if printed)
Engine Type:
Naturally Aspirated V8
Displacement:
4.7 Liters (4664 cc)
Bore X Stroke:
96.0 mm x 81.0 mm
Compression Ratio:
10.5:1
Horsepower:
306 bhp @ 5500 rpm (SAE Net)
Torque:
317 lb-ft @ 4500 rpm (SAE Net)
Fuel Delivery:
Bosch L-Jetronic Fuel Injection
Fuel Type:
Unleaded Premium Gasoline (91+ Octane)
Ignition System:
Electronic Ignition with distributor
Transmission Type:
5-Speed Manual Transaxle
Transmission Type:
3-Speed Automatic Transaxle (Tiptronic not yet available)
Transaxle Design:
Rear-mounted transaxle combining transmission and differential for optimal weight distribution.
Manual Transmission Fluid:
API GL-4 or GL-5, SAE 75W-90 or 80W-90 (refer to specific workshop manual for exact Porsche specification)
Automatic Transmission Fluid:
Dexron III (or equivalent)
Crash Test Information:
Limited official crash test data for this era, but known for robust construction.
Braking System:
Vented Disc Brakes (Front and Rear) with Power Assistance
Anti Lock Braking System:
ABS was an option, but not standard on all 1983 USA models.
Seatbelts:
3-point inertia reel seatbelts with height adjustment.
Airbags:
Not available on 1983 models.
Headrests:
Integrated headrests on front seats.
Audio System:
Factory fitted Blaupunkt or Becker radio/cassette player common.
Speaker System:
Standard speaker configuration.
Cruise Control:
Optional, electronically controlled.
Connectivity Features:
None by modern standards (no Bluetooth, USB, etc.).
Oil Change Interval:
Every 3,000-5,000 miles or annually, whichever comes first (recommended for vintage cars).
Timing Belt Replacement:
Every 30,000 miles or 3 years (critical due to interference engine design).
Spark Plug Replacement:
Every 15,000-30,000 miles, depending on type.
Engine Oil Capacity:
9.5 Liters (10.0 US Quarts) with filter change.
Engine Oil Specification:
10W-40 or 15W-50, API SG or higher (check specific manual for Porsche A40/C30 specs if applicable, though unlikely for this era).
Coolant Capacity:
Approx. 12.0 Liters (12.7 US Quarts)
Coolant Specification:
Porsche approved coolant or a high-quality ethylene glycol based coolant with corrosion inhibitors.
Electrical Component Aging:
Degradation of wiring insulation, failing relays, and aging electric motors are common, making this manual invaluable.
Fuel System Issues:
Clogged fuel injectors or failing fuel pumps can occur with age.
Cooling System Issues:
Leaky hoses, failing water pump, and clogged radiators are potential problems.
Exhaust System Issues:
Corrosion and failure of catalytic converters (if equipped and applicable for USA).
Brand Focus:
Porsche is renowned for its sports car engineering, racing heritage, and performance vehicles.
928 Introduction:
Introduced in 1977, the 928 was a departure from Porsche's traditional rear-engine sports cars.
928 S Introduction:
The 'S' designation was introduced in 1979 for European markets, with the USA receiving the larger displacement 4.7L V8 in 1983.
Key Updates 1983:
Increased engine displacement, improved power output, revised suspension, and updated interior/exterior styling.
Production Years:
1977-1995 (across all variants)
Manufacturing Location:
Stuttgart, Germany
