Question about 2001 Jeep Grand Cherokee
Well, it is most likely a vacuum leak *somewhere*. Open the hood, look around carefully for any cracked, broken, or disconnected vacuum lines (these are usually about 1/4 inch in diameter, black rubber hoses, sometimes 1/8 inch diameter rigid black plastic tubing). Often one or more goes to the firewall to control the a/c dampers, make sure that the air comes out of the defrost vents, the dash vents, and the floor vents according to the knob settings, if not, look for the engine to dash hose.
Posted on Sep 01, 2010
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Posted on Jan 02, 2017
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