Hello i am an electrical engineer and i am quite determined to solve a problem in my Fiat Tempra 1992 SW. It has high carbohydtares and it is trembling when idling. Replaced carburator, electronic ignition all sensors, fuel pump, distributor,spark plugs,computer, and did an overhall to the engine (valves rings e.t.c) I know it cost me more than bying a new one but i am determined to solve the problem. Any help will be very appreciated. If no one can solve the problem in a simle car like this how should i trust than a new car loaded with electronics can be fixed when it has a similar problem. Everyone tells me that it is an engine problem. Any suggestions?