Clean your idle air control valve near the throttle body with electrical parts spray cleaner.
It can also be a vacuum leak. This car is 17 years old. Replace all under hood vacuum lines. Replace them one at a time as to not bet confused.
my 1993 crown vic shut off with out warning while at stop light only once in a while
hibernation
Depending on the severity,yes,it will may run rough or idle hard
You don't. The Idle is controlled by the ECM. There are no idle adjustments
The increased idle when started is normal, all properly working cars that aren't ancient will do it. As far as the hard shift goes, your tranny.
Could have a bad motor mount
Idle speed control or Idle air control.
Don't let the computer turn it off when it is idle, the constant spin-up and spin-down really wears on the bearings, shortening the hard drive's life. The bearings in a hard drive were designed to be constantly spinning.
Idle is computer controlled and can NOT be adjusted.
won't idle
broken air intake after the air filter and the mass air flow censer. connects to throttle.
There is none. It is electronic. Try replacing the idle motor.