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Cadillac Eldorado Problems

Check Engine Light Due to Intake Manifold Vacuum Leaks on Cadillac Eldorado

Problem Description and Possible Solution

An intake manifold vacuum leak can develop from a variety of sources, often causing illumination of the Check Engine Light with codes P0171 & P0174 stored. Thorough diagnoses will be necessary to pinpoint the cause in order to make the correct repairs. A "smoke" machine is often used to isolate the cause of difficult to find vacuum leaks.

(12 people reported this problem)

Cadillac Eldorado Vehicles With This Problem

RepairPal Verified
Average mileage: 149,500 (119,000–180,000)
Engine affected: 4.6L V8
10 model years affected: 1993, 1994, 1995, 1996, more1997, 1998, 1999, 2000, 2001, 2002
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Brake problem? Or maybe a faulty head gasket cylinder?
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