Magna running rough

MY 1994 Mitsubishi Magna auto has been running rough. Servicing has been done at the appropriate times, but since we moved house the vehicle wants to cut out when idling at lights, or won't restart after travelling a short distance. The carburettor was serviced 12 months ago and the car has had a total motor service in the past couple of months, including a fuel filter change. RACV roadside was called when the car wouldn't start and suggested a carby problem, but it was done 12 months ago. A strong smell of petrol was also present and the petrol usage is quite high. As we have moved house, I am finding it hard to find a reputable service centre to service both my cars.