306 some problems

First of all, hello everyone, I am new to you, I have 306 gti vehicles. When I turn the model model halfway into the ignition position, there is a bursting noise from the engine, but then the car runs when the ignition is fully turned on, and sometimes this problem does not sometimes it does not, and the tachometer and the oil indicator of the vehicle do not work first. Can you help with these issues that are more important than other issues ???

First of all, welcome to us. Is there LPG in the vehicle bro? No, if it is only gasoline, the explosion event comes from the full engine. There may be an electric leak in the vehicle - the interceptors may miss gasoline. - the control may be faulty.

There is no LPG in the vehicle, no explosion sound should be coming from the intake manifold part.

As far as I understand, half the contact, so you get this sound before you start, right, bro.

this half-burst

There may be a problem in the key slot, brother, when you make half contact, it sends an instant electricity as if it is pressing margin. Crack in manifold etc. can. You need a good master who understands peugeot, you will not fly at the price.

I understand that I will write my brother developments based on what my brother said ...