Problem Reports
Cadillac DeVille
Report: Check Engine Light Due to Intake Manifold Vacuum Leaks
Cadillac DeVille Problem
Model Years Affected: 1991, 1994, 1995, 1996, 1997, 1998, 1999
Engines Affected: 4.6L V8, 4.9L V8
Average Mileage: 99,350 mi (11,700 mi - 187,000 mi)
Verified
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.
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Report #1vandy, 1991 Cadillac DeVille, 11,700 mi
Rookiecheck engine light comes on while driving
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Report #2jamrs1947, 1996 Cadillac DeVille, 187,000 mi
RookieEngine need servic cod#10174
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Report #3Me GRIZZLY, 1995 Cadillac DeVille, 4.9L V8
Rookienot fixed yet
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