The strong demand for low emissions from spark ignition engines alongside the introduction of microcomputers in cars has increased the attention paid to fuel injection control. Initially, controllers were in feedforward configuration and look-up tables were employed. Later feedback configurations emerged. We use a combined approach. A feedforward controller is used based on simple equations and coarse approximations. A sliding mode feedback controller is added to achieve the desired performance. Nonlinear simulation results demonstrate the efficacy of the approach.