308 flickering problem at first start

My friends vehicle is 308 1.6 vti (gasoline). The vehicle vibrates for a while at the first start and the engine noise is erratic. It will recover in about 1 minute. I think it's from injectors. What are you thinking?

Do I play the revolutions? Well, if it is not up or down at that moment, it just makes me click.

If there is a fluctuation in idling, it is necessary to look at the idling sensor & nbsp;

Idling drops to 700 rpm. When I think again; While the car stops at traffic, the cycle is always at 700. 700 low do you think? & nbsp; It was in the 900s before.

It is necessary to connect your vehicle to the original Peugeot test device first.

The engine on it has vvt-i technology.

It consists of various parts. it is useful to check for vsvs .. first test but ..