Fuel Delivery and Air Induction: Description and Operation

CIS Fuel System W/Differential Pressure Regulator:

The CIS - Motronic engine control system is a mechanical, continuous injection system which is electronically controlled. The system is based on the Bosch KE-Jetronic fuel injection system, and combines electronic fuel and ignition control functions into a single electronic control unit (ECU). The ECU monitors various engine sensors and uses this information, compared with information stored in its memory, to precisely control the fuel and ignition systems for lower exhaust emissions, better fuel economy and better engine performance, under all operating conditions.

The primary fuel and intake system components are covered here. For information about the computer, controlled devices and information sensors, refer to Powertrain Management / Computers and Control Systems.