A vacuum leak from the PCV grommet vacuum leak can cause the Check Engine Light to illuminate. The molded rubber hose connections may crack and collapse, causing the vehicle to run roughly. A damaged PCV hose will require replacement.Google+
Car Problem Reports
Lincoln Town Car Check Engine Light Due to PCV Grommet Vacuum Leaks
Lincoln Town Car Problem
Average Mileage: 122,100 mi (98,300 mi - 139,000 mi)
Visitor, 1996 Lincoln Town Car, 139,000 mi
I have had all four cat. converters replaced, colored gaskets all replaced. The code reads problem with left bank. It's been on for two years and nobody can help get it off. They take it off when I have my emissions inspection, but it comes back on two or three days later. Thanks in advance.
Visitor, 1994 Lincoln Town Car
When cold and take off runs . Rouph till motor warms up
Visitor, 2004 Lincoln Town Car, 98,300 mi
Check Engine Light was on and the engine ran very rough, particularly while idling.
Repaired by Replacing the elbow-crankcase ventilation tube (Ford part number YL8Z-6767-AA) $9.
However it took 2.5 shop labor hours to replace the part, which seemed a bit high.
Visitor, 2000 Lincoln Town Car, 129,000 mi
pcv hose leaking. now engine light comes one also. its been hard to find a replacement part for my 2000 town car though.