Car Problem Reports

Cadillac Fleetwood Performance Issues Due to Faulty ECM Grounds at Front of Engine

Cadillac Fleetwood Problem
6 Reports
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Model Years Affected: 1990, 1991, 1992, 1993, 1994


The engine control module (ECM) electrical grounds on the front of the engine block may have high resistance causing a rough running engine or stalling condition.

  • , , 140,000 mi

    Runs fine, the all of a sudden, begins to run rough, rough idle, stalls when stopped or in turns, check engine light comes on only when on highway, sevice soon light on sometimes. 2 different mechanics couldn't find problem.

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