Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1986 Porsche 944 Base, AutomaticFACTORY OEM SERVICE PROCEDURE
DME System
- Description
- Operation
- Adjustments
- Diagnosis & Testing
- Notes
- Electrical Connections
- Cu Power Supply
- Ignition Circuit Power Check
- Speed Sensor Check
- Reference Mark Sensor Check
- Ignition Coil Resistance Check
- Ignition Resistance Checks
- Airflow Sensor
- Knock/Charging Pressure Control
- Idle Actuator
- Air Temperature Sensor I
- Fuel Pressure
- Temperature Sensor II
- High Altitude Switch
- Throttle Switch
- Oxygen Sensor
- DME Control
- Removal & Installation
- Wiring Diagrams
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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