Cadillac Eldorado Problem Report

Cadillac Eldorado Check Engine Light Due to Intake Manifold Vacuum Leaks

(12 reports)

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.

leak in intake manifold -
Related Items:
The crankshaft position sensor may fail causing the engine to stall intermittently, the Check E...
A Loose or worn gas cap may cause Check Engine Light to illuminate.
The torque converter clutch (TTC) may stop working due to an internal transmission failure. The...
The engine may develop an oil leak from the lower crankcase portion of the engine block. Our te...
The EGR valve may stick open, causing a rough idle and/or the Check Engine Light to illuminate.

Related Content