Ha Zergio73, there are many steps and things to check, but let's start with the start, listen and see, you have walk the vehicle and listen to the exhaust of the exhaust as the gases come out, they have to leave even, that is to say continuously, if it sounds like it is to say it comes out gas and it is cut, it makes like a pop while the gases come out and also the smoke that can grate or not, in the high Injectors Sensors or engine in general, but first捷克,让我们知道。