Vehicle was not accelerating properly, so took to the dealership (Mike Shaw Subaru) to have work completed. Technicians indicated that the engine valves (shim valves) all had to be replaced and other work needed to be performed such as: Intake manifold, shim valves, gasket throt chamber. After dealership assured me that all work was performed and car was okay to take home, the next time it was driven it burst into flames. After filling the tank with gas the vehicle was at a red light. Once accelerator was pushed the vehicle engine burst into flames. Unsure if it is a faulty part or incompetent technician