This is a very common problem for all 1.8 & 2.4 GDI Mitsubishi and Volvo's. Common faults include stalling at idle, revving up and down and power loss. in some cases the throttle body will prevent the engine from starting.
Non running engine or very poor running.
The Mitsubishi engine ECU fitted to these models are common failures The problem lies with the type of capacitors used inside the ECU, they are prone to damage from voltage spikes. Even the voltage spike from a starter motor has been known to blow one of these Mitsubishi ECU's.