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1991 Porsche 944 CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Porsche REPAIR SHOPS DON'T WANT YOU TO KNOW
Learn how to repair a car or truck, install or remove parts, wire an engine, reset warning lights, replace fuel filter, fix auto body and more. Get Automotix DIY!Select Section
- Component Locations
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- Technical Service Bulletins
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- A/C & Heater Service
- Brake Service
- Fuel Filter Replacement
- Driveline, U-Joint & CV Axles Replacement
- Starter & Alternator Replacement
- Maintenance Lamp Reset
- Radiator & Hose Replacement
Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 1991 Porsche 944 car and truck
repair procedures including Porsche engine diagrams, wiring diagrams, repair work estimating measures, technical service bulletins, auto body work
guidance, starter & alternator replacement procedures, serpentine belt replacement procedures, radiator & hose replacement procedures, tune-up &
drivability specifications, quick lube illustrations, preventive maintenance guide, engine light reset instructions, parts removal and install
procedures, fuel filter replacement directions, component location diagrams, air filter locations & replacement instructions, a/c
system specifications, and general auto service procedures. You don't have to be a car mechanic or technician to know how to fix
your Porsche 944 automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR 1991 Porsche 944 AUTOMOBILES
Porsche -> Component Replacement & Adjustment -> HEATER CORE, REPLACE -> 928 -> 944 & 968
Vehicle: 1991 Porsche 944 S2 3.0 L4 GAS
928
- Remove air conditioner/heater unit as outlined under "Air Conditioner/Heater Unit, Replace."
- Separate unit case halves, then remove heater core from case.
- Reverse procedure to inst...
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BRAKE SERVICE PROCEDURES FOR 1991 Porsche 944 AUTOMOBILES
PORSCHE, HYDRAULIC BRAKE SYSTEMS -> BRAKE BLEEDING
Vehicle: 1991 Porsche 944 S2 3.0 L4 GAS
Brake fluid is extremely damaging to paint. If fluid should accidentally touch painted surface, immediately wipe fluid from paint and clean painted surface.
- Fill reservoir to rim with brake fluid, then remove filter insert.
- Attach pressure bleeder to reservoir, then turn pressure bleeder on.
- First bleed clutch, then maste...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 1991 Porsche 944 AUTOMOBILES
Porsche -> Fuel Filter Replacement -> Except Cayenne & 1995-98 911
Vehicle: 1991 Porsche 944 S2 3.0 L4 GAS
Do not smoke or allow an open flame of any type when working on or near any fuel system related components. The highly flammable vapor mixtures may ignite, resulting in serious personal injury.
- The fuel filter can be accessed after removing the underbody cover.
- Disconnect the battery ground cable.
- Disconnect the ground cable from filter.
- Place a shop towel over fuel line to fuel filter connec...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1991 Porsche 944 AUTOMOBILES
CV AXLE SHAFT, Replace -> Rear
Vehicle: 1991 Porsche 944 S2 3.0 L4 GAS
Rear
- Raise and support vehicle.
- Remove cotter pin from hub castle nut.
- Remove castle nut with special tools P42a, P36b, P44a, and P296.
- Remove Allen bol...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1991 Porsche 944 AUTOMOBILES
Alternator, Replace
Vehicle: 1991 Porsche 944 S2 3.0 L4 GAS
- Remove righthand seat and open rear wall cover.
- Disconnect alternator and starter battery power leads.
- Remove serpentine drive belt.
- Remove righthand mount bolt and loosen lefthand mounting bolt three turns, then gently tab bolt to loosen threaded bushed in alternator arm, use a suitable aluminum mandrel to tap bolt.
- Remove alternator from slotted bracket, then the deflection roller.
- Turn alternator cloc...
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MAINTENANCE LAMP RESET PROCEDURES FOR 1991 Porsche 944 AUTOMOBILES
Porsche -> Check Engine Lamp -> -> DME System M 09, ME 7.2 & ME 7.8 -> DME System ME 5.2 -> Except DME System M 09, ME 5.2, ME 7.2 & ME 7.8
Vehicle: 1991 Porsche 944 S2 3.0 L4 GAS
Except DME System M 09, ME 5.2, ME 7.2 & ME 7.8
The Check Engine lamp will be illuminated when the ignition switch is in the on position with engine not running. When the engine is started, the lamp should go out. If the lamp remains lit, a diagnostic trouble code has been stored by the Electronic Control Unit (ECU). After diagnosis and repair are complete, place ignition switch in on position without starting engine, then depress accelerator pedal fully for more than 11 seconds. ECU memory should be cleared and the Check Engine lamp should be reset.
DME System ME 5.2
The Check Engine lamp will b...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1991 Porsche 944 AUTOMOBILES
Heater Hose, Replace -> Inlet -> Outlet
Vehicle: 1991 Porsche 944 S2 3.0 L4 GAS
Inlet
- Drain coolant into a suitable container.
- Reposition clamp at heater core and remove hose.
- Reposition clamp at disc valve and remove hose.
- Remove hose from vehicle.
- Reverse procedure to i...
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COMPONENT LOCATION DIAGRAMS FOR 1991 Porsche 944 AUTOMOBILES
Component location diagrams for most 1991 Porsche 944 cars and light trucks sold in the U.S. from 1990+.
 Central Electrics Relay Locations Diagram for 1991 Porsche 944 S2 3.0 L4 GASComponents on diagram: |
 Alarm Control Unit Diagram for 1991 Porsche 944 S2 3.0 L4 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 1991 Porsche 944 AUTOMOBILES
OEM drawn wiring diagrams for most 1991 Porsche 944 cars and light trucks sold in the U.S.
 1991 Porsche 944 S2 3.0 L4 GAS Wiring DiagramComponents on diagram: |
 1991 Porsche 944 S2 3.0 L4 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 1991 Porsche 944 AUTOMOBILES
OEM TSB listings for most 1991 Porsche 944 cars and light trucks sold in the U.S. from 1985+.
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Document: WARRANTY ADMINISTRATION - CSO SURCHARGES NOT ALLOWED ON WARRANTY CLAIMS Vehicle: 1991 Porsche 944 S2 3.0 L4 GAS Auto Systems: |
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Document: OVERVIEW OF APPROVED ENGINE OILS - REVISED Vehicle: 1991 Porsche 944 S2 3.0 L4 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 1991 Porsche 944 AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1991 Porsche 944 cars and light trucks sold in the U.S. and Canada from 1970+.
- Brake caliper mounting bolt torque
- Brake drum runout, machining, & discard specs
- Minimum brake lining thickness.
- Brake rotor runout, parallelism, machining, discard, & finish specs
A/C SYSTEM SPECIFICATIONS: Air conditioning refrigerant capacity and type as well as lubricant capacity for most 1991 Porsche 944 cars and light trucks sold in the U.S. and Canada from 1980+.
- Refrigerant capacity & type, compressor oil viscosity, total system oil capacity & compressor clutch gap
COOLING SYSTEM BLEED: Cooling system bleeder valve identification, bleeder type and bleed procedures for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1986+.
PREVENTIVE MAINTENANCE: Preventive maintenance recommendations and required services for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1980+. Includes severe and routine service schedules
QUICK-LUBE and ILLUSTRATIONS: Fluid recommendations, capacities, drain plug torques, tire data, and severe service recommended preventive maintenance schedules. Information covers most 1991 Porsche 944 cars and light trucks sold in the U.S. and Canada from 1980+. Engine and chassis service images.
- Automatic transmission/transaxles capacities, lubricant recommendations
- Differential/final drive capacities, lube recommendations, grades, & viscosities
- Final drive fill & drain plug torques
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Manual transmission/transaxle capacities, lube recommendations, grades, & viscosities
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Engine oil capacities, API grade recommendations, SAE viscosity recommendations, drain plug torque
- Severe service maintenance & interval recommendations
- Tire sizes, wheel nut/bolt torque, pressures & rim sizes
- Transfer case capacities, lube recommendations, grades, & viscosities
TUNE-UP & DRIVEABILITY SPECIFICATIONS: Most tune-up specifications for most 1991 Porsche 944 cars and light trucks sold in the U.S. and Canada from 1980+
- Airflow sensor electrical specifications
- Tensioning specifications for systems with automatic tensioners
- Barometric pressure sensor specs
- Battery group number and cranking performance
- Crankshaft & camshaft position sensor resistance
- Engine compression pressures
- Coolant temperature sensor specs
- Computer advance.
- Diesel fuel temperature sensor resistance.
- Distributor advance specifications
- Ignition pickup coil resistance
- Exhaust gas recirculation temperature sensor resistance
- Engine fastener torque values
- Firing order diagrams
- Fuel system pressures
- Generator (alternator) specs
- Intake air temperature sensor specs
- Ignition coil specifications
- Fuel injector resistance
- Engine idle speeds
- Knock sensor resistance
- Manifold absolute pressure sensor specs
- Mixture control solenoid resistance
- Voltage regulator specs
- Spark plug applications & gaps
- Starter motor electrical specs.
- Tensioning specifications for systems without automatic tensioners
- Throttle body temperature sensor resistance
- Ignition timing in degrees at rpm
- Transmission oil temperature sensor resistance
- Throttle position sensor specs
- Vacuum sensor valve specs
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