Has anybody else had a problem with the tickover on a 1998 4.6 rangerover.
The car has a prins LPG system fitted.

The tickover speed has been reset (on many occasions) by a 4 x 4 specialist at 625 rpm as per book.
All the readout settings on the diagnostic are correct.

After a period of time which can vary from 10 minutes to 10 weeks the tick over suddenly increases to around 1500 rpm.

Cant help you im afraid, but you could try posting in the Range rover section and you may get more replies.

Scott.