A control system for a positive displacement, electrically actuated fuel pump receives one trigger pulse per engine cycle during normal operating conditions and a plurality of pulses per cycle during starting conditions from a computer circuit forming part of a fuel injection system. A control circuit generates one driving pulse for the fuel pump for each trigger pulse as long as the period between the pulses remains sufficient for the pump to complete its cycle and deletes control pulses to the pump when the engine speed is excessively high. A variable displacement electric pump is controlled to provide the engine with a fuel flow proportional to its operating rate by a variable on-time switching system controlled by an engine speed sensor and/or load sensor.