mra

Hi I have recently purchased a GS300 mk1 and love it. However when cold it ticks over at approx 1500 rpm which makes engaging drive or reverse snatchy to say the least. It does settle to normal as the temp gauge rises but takes longer than I think it should. About 2-3 miles currently. The temp gauge has to be above 1/4 before it starts to slow. Is there a seperate sensor for the cold start setting? or is this normal. Regards Matt