Hi, My 1995, 355 Engine is hard to start for the first start "cold engine" every time. On the second try, it starts ok every time. The idol is a little rough after the engine has warmed up. Driving is fine. so I changed the spark plugs, but this did not help. Can anyone give me some advise on what to check next??? I live in Macau near Hong kong and do not have a Ferrari service center in this city.