started my carup in the morning so the engine dont get siezed because its been snowing here, anyway started the car up then once the car was warm i reved it alittle bit then the car kept going to 2 thousand revs then fropin to abou 1 and three quarter thousand revs then jumpin back to two then dopin back to 1 nd three quaters then i saw on the floor this belt can anyone tell me what it is?thanks rep wil be given, also when i saw this belt i started car on to see if it still runs and it did start up so cant be the timing belt and fan belt still on too!? dont know wha tbelt it is!