Nearly all of the Porsche and Ferrari production cars assembled between the late 70's and the late 80's were equipped with Bosch CIS mechanical fuel injection system. The Bosch CIS(Continuous Injection System) is a durable, fairly efficient and maintenance-free injection system designed to compensate for altitude, cold and warm starts as well as real time mixture by way of the Lambda(Oxygen) Sensor.
The two enemies of this system are storage and age. Each of these cause a CIS Injection system to develop leaks and corrosive buildup. These issues can be prevented by periodic inspection and strategic repairs.
Don't be scared off by a CIS injected vehicle. These systems have proven their reliability time and time again, as many cars on the road today still run the original injection components. Maintained properly, these systems will provide years of solid, dependable service. Here's a glimpse of a repair we performed recently on a mid-eighties powerhouse!