1990 Porsche 928 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1990 Porsche 928
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1990 Porsche 928 ProblemsFaulty igntion system causing misfire detection system to reduce engine power
The ignition system must be maintained—distributor caps, rotors, and cables require attention. The misfire detection system can cause the engine to shut down by half. The root cause of the problem must be ascertained before repair.
Aged brake fluid can cause numerous problems and should be replaced regularly.
1990 Porsche 928 Questionselectrical system does not turned off completely (1 answer)
I have 1989 Porshe 928 s4. Recently when the car is turn off all instrument lights will turn off, but there is a low glow of light in the instrument dash quite visible in the dark. If left for a day or two it will completely drain the battery. Anyone have an answere!
The differential starts to act up after some normal driving. I get grinding noises especially when turning at low speeds. Have tried changing the fluid including using additives etc... it seems like there is damage in there. Has anyone experienced this and know what it might be? Is it worth r...