🏷️ Basic Information Identification Make: Porsche Model: 944 Year: 1985 Codes Chassis Code: 944 Engine Code Prefix: M44 👋 Introduction Market Position Vehicle Class: Sports Car / Grand Tourer Target Audience: Enthusiasts and owners seeking to understand and maintain the complex electronic systems of their 1985 Porsche 944. Competitive Analysis Market Niche: Specialized diagnostic information for a classic Porsche model, offering technical depth often missing in generic repair guides. Key Features Benefit 1: Empowers owners to accurately diagnose and troubleshoot DME-related issues, potentially saving on costly professional repairs. Benefit 2: Provides 'technician-level' information, ensuring a thorough understanding of the vehicle's electronic brain. Benefit 3: Model-specific accuracy, ensuring relevance and avoiding the pitfalls of generic automotive manuals. Accessibility: Instant download after purchase, eliminating shipping delays and offering immediate access to critical information. Guarantee: 30-day money-back guarantee for customer satisfaction and purchase confidence. 📋 Manual Details Coverage Areas Primary Focus: Digital Motor Electronics (DME) System Page Count Estimated Pages: Variable (Print-on-Demand) Manual Type Type: Technical Service/Diagnostic Manual Language Language: English Format Format: Digital Download (PDF) 📖 Manual Coverage Systems Covered Engine Management: Comprehensive coverage of the Bosch DME control unit and its associated sensors and actuators. Ignition System: Detailed diagnostics for ignition timing, coil operation, and distributor functions related to DME control. Fuel Injection System: Troubleshooting of fuel injectors, fuel pump, fuel pressure regulator, and air flow meter. Sensors: In-depth analysis of Mass Air Flow (MAF) sensor, Throttle Position Sensor (TPS), Engine Coolant Temperature (ECT) sensor, Crankshaft Position Sensor (CPS), and Oxygen (O2) sensor. Actuators: Diagnosis of Idle Air Control (IAC) valve, cold start valve, and fuel injector operation. Electrical System Diagnostics: Focus on DME-related wiring diagrams, connector pinouts, and voltage/resistance testing. Procedures Included Troubleshooting: Step-by-step diagnostic procedures for common and uncommon drivability issues related to the DME system. Testing: Specific tests for individual DME components, including resistance checks, voltage checks, and signal integrity tests. Calibration Adjustment: Information on any user-adjustable parameters or calibration procedures related to the DME (though often limited on this era). Component Replacement: Guidance on the proper removal and installation of DME-related components. Technical Depth Depth: Advanced diagnostic and troubleshooting, targeting technicians and experienced DIY enthusiasts. 📊 Manual Specifications File Format PDF Quality: High-resolution, searchable PDF, optimized for digital viewing and selective printing. Print Quality Printability: Designed for selective printing of necessary pages, ensuring efficient paper and ink usage. Binding Type Binding Method: Not Applicable (Digital Download) Paper Type Paper Quality: Not Applicable (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Inline 4-cylinder, front-mounted Displacement: 2.5 Liters (2479 cc) Bore X Stroke: 104 mm x 73.3 mm Compression Ratio: 10.2:1 Performance Horsepower: 143 hp @ 5500 rpm (U.S. Spec) Torque: 170 lb-ft @ 3000 rpm (U.S. Spec) Fuel System Fuel Delivery: Bosch L-Jetronic Fuel Injection (DME controlled) Fuel Type: Unleaded gasoline, 91 octane (RON+MON)/2 (U.S. rating) Cooling System Cooling Type: Liquid-cooled Engine Management System Dme Model: Bosch Motronic (specific variant may vary, typically Motronic ML4.1 or similar) 🔧 Transmission Standard Type: 5-speed Manual Transaxle Optional Type: 3-speed Automatic Transaxle (Tiptronic not available) Features Layout: Rear-wheel drive with transaxle (engine front, gearbox rear) Fluid Type Manual Transmission Fluid: GL-4 Gear Oil, SAE 75W-90 Automatic Transmission Fluid: Dexron III/Mercon compatible fluid 📐 Dimensions Exterior Length: 4210 mm (165.7 in) Width: 1715 mm (67.5 in) Height: 1280 mm (50.4 in) Wheelbase: 2450 mm (96.5 in) Weights Curb Weight: Approx. 1240-1300 kg (2734-2866 lbs) Gross Vehicle Weight Rating: Approx. 1700 kg (3748 lbs) Towing Capacity: Not Recommended Fuel Capacity: 70 Liters (18.5 US gal) 🛡️ Safety Features Ratings NHTSA Rating: Not rated under modern standardized protocols. Active Features Brakes: Four-wheel disc brakes, front vented discs (282mm), rear solid discs (299mm). ABS optional on some models/markets. Passive Features Seatbelts: Three-point inertia-reel seatbelts Airbags: Driver airbag not standard on 1985 models. Rollover Protection: Integrated roll bar within the windscreen frame. 💡 Technology Features Infotainment Audio System: Original Porsche/Blaupunkt AM/FM cassette player (likely upgraded in many examples). Speaker Configuration: Typically 4 or 6 speakers. Driver Assistance ABS: Optional on some 1985 models, primarily found on higher-spec or later production cars. Connectivity Phone Integration: Not applicable. 🔧 Maintenance Service Intervals Oil Change: Every 15,000 km (9,300 miles) or annually, whichever comes first. Timing Belt Replacement: Critical: Every 80,000 km (50,000 miles) or 5 years due to potential for catastrophic engine damage if it fails. Spark Plug Replacement: Every 30,000 km (18,600 miles) Brake Fluid Flush: Every 2 years Fluid Specifications Engine Oil Capacity: 5.5 Liters (5.8 US Quarts) with filter change Engine Oil Viscosity: 15W-50 or 20W-50 (depending on climate), API SG or higher Coolant Type: Porsche approved coolant or a high-quality ethylene glycol-based antifreeze with corrosion inhibitors, mixed 50/50 with distilled water. Brake Fluid Type: DOT 4 Known Issues Common Issue 1: Oversensitive or failing Mass Air Flow (MAF) sensor leading to erratic idle,...