My friends 307 1.6 lpg car. I have been having serious problems for 1 week. Even though my vehicle is dropping from the traction, there is constant tremor even though it freezes from time to time. Departure. Every difficulty, every master is breathing different things. Please know what I need to do. I think the problem would be solved if I change the coil as far as I read, but the master said to me that the sibob was burnt to me.