Idle air control valve on the rear of the OS engine bank is a favourite. Remove, clean with carby cleaner, oil spindle & reset distance. Also check that it's plate is tight & sealed (3 screws)
Electronic contact cleaner jetted into the AFM Bypass canal to clean the hotwire is another favourite. (why LR did not select a self cleaning hot wire model is beyond me. Some manufacturers do use those. A higher electric current flows through it at switch off of ignition & supposedly burns off any airborne carp)
One suspect I found recently ( can't prove it yet) was the cleaning of the hard to access 3 pin plug under the throttle body to the Throttle Potentiometer. It had never been touched since vehicle assy in '95 & I suspect needed the pins & plug hitting with Electronic Contact Cleaner.
Seems ok now anyway.