1992 Nissan 240SX Coolant Gauge Fluttering..

[Cory_Marshall]

The Coolant Gauge in my 1992 Nissan 240SX Sits in the middle.. When you start to Rev the car up a LITTLE bit it starts to flutter a LITTLE bit, Then when you rev it higher it just Stops working and goes FULLY down to cold...

I was wondering what this could be, This is the ONLY problem with a basically MINT car I bought.

ANY help would be Appreciated as to what this would be..