My 2001 Fiat Palio 1.6 el 16v has suddenly out of the blue decided that once you have drove it for a period of time in town and then park it to use latter again the palio simply refuses to start making a very slight klicking noice! Then when the car is left for a hour or so then it decides to start! I have had the Palio on diagnostics equipment which shows no electronic fault. I have a battery check test which passed. Please can anybody assist it what the problem can be! thanking you