Vehicle was being driven down the road. Vehicle stalled. Check engine light came on. Attempted to restart vehicle but vehicle stalled again. Smelled fuel. Heard a boom then fire ignited. Fire came from the underside of vehicle and flames were rising on driver side of vehicle with black smoke. Attempted to exit vehicle from driver side door but was unable to do so due to flames. Crawled over to passenger side of vehicle and exited the vehicle. Fire department extinguished the fire with water. Fire reignited and fire department extinguished fire again. Insurance company inspected the vehicle but was unable to determine root cause of fire.