Could be an idle control or speed device that needs to be clean-out and adjust IAW the service manual.
You might want to have the OBD2 scanned for code/s.
November, 16, 2007 AT 2:10 AM
The idle speed is controlled by the AIR BYPASS VALVE it is also commonly called an idle air control valve.
Lincolns have quite a few issues with these.
It is on the top rear of the intake plenum....Kind if way back there on a 02..but you can get to it...
Two bolts hold it on and one hose and one wire connector plug into it.
45-80 dollar part. You can give it a couple of pretty hard taps with a small to med hammer.... this will fix many of them...you can also take it off and clean with carb cleaner...
Here is a picture
December, 7, 2007 AT 6:48 PM
I rapped it and it started idling right. Would love to take it off and clean it good but don't have a gasket and that lower bolt would be Hell.