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Porsche 928 Problems

Engine misfire or excess fuel consumption can damage catalytic converter on Porsche 928

Problem Description and Possible Solution

If engine misfiring, rough running, or fuel consumption issues are not resolved quickly, the catalytic converter can overheat and fail.

(5 people reported this problem)

Porsche 928 Vehicles With This Problem

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Average mileage: (–)
5 model years affected: 1990, 1991, 1993, 1994, more1995
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Brake problem? Or maybe a faulty head gasket cylinder?
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