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.
1992 Porsche 911 AmericaFACTORY OEM SERVICE PROCEDURE
Ground Circuits
- Use DVOM to check continuity to ground on Digital Motor Electronics (DME) control unit ground circuits at terminals No. 14, 19, 24 and 30. See Figure . See WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section. Ensure ohmmeter reading is zero ohm.
- If reading is not zero ohm, repair open ground circuit. Check DME ground wires on cylinder No. 1 intake pipe and fuel filter mount. Check ground strap between body and transmission/engine. Ensure all electrical connections are securely attached and free of corrosion.
Factory Service Tools
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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.