1991 Porsche 928 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1991 Porsche 928
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1991 Porsche 928 ProblemsAged brake fluid causing problems
Aged brake fluid can cause numerous problems and should be replaced regularly.
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.