Doesn't hold 406 cycles

Hello friends, I have a peugeot 406 2000 sv model, when I bought the car 2 years ago, when I bought it, there was a problem with rolent, the person I bought in the car said that you will just change the coil and changed it, then it went into order and the car that is running in the helm in the future stops constantly in the lights, etc ... it does not keep the gas in the gas at the same time, it is constantly shaking. There is a landirenzo tube in the motor vehicle. If you help your friends, I will be glad. Thank you very much ....

I may be wrong, the friend had the same problem, if I am not wrong, there is a power cable going to the brain. the problem was solved after we were tired. Of course, the cable loosens again, the same problem, the same solution, maybe something like that.

This was almost the same as this fault, the black smoke gas-free routine was irregular, the oxygen sensor was newly installed.