digitalsushi

Hi there, I recently bought a 2005 Toyota Echo about two weeks ago. I don't really know much about cars... But when I start it and the engine is cold (and the cold temperature light comes on), the engine tends to rev heaps until the little cold temperature warning light disappears. I used to have a Celica, but this never happened with it, so I just wanted to find out if anyone knew if this is normal? Thanks !