cant hold revs steady when warm

1. samclose Infrequent Poster Joined: May 2010 billingham Posts: 141 Saxo flat arch vtr engine 206

   #1 13th May 2011, 12:24

   when the car is cold you can hold the revs steady but when you engine gets warm then the revs bounce and wont stay steady.
   any advice on what to do
   thanks sam