Peugeot 206 problem with car cutting out of power when driving and sometimes not starting

Your first port of call would be a code read to elliminate anys possible faults with the engine, if that checks out ok check battery leads and engine earth

i had a similar problem, the previous owner of my car changed the battery before selling it. this new battery was smaller than the origional. this meant it sat lower in the battery casing and one of the battery ocnnectors was not able to stay attatched.
I just cut a hole down into the casing so it made room for the connector to slot down and attatch properly. I dare say putting a piece of wood underneith the battery to raise the position of the battery could also be halpful and avoid having to cut through the casing.

hi i want to know if someone has got any ideas with my girlfriends 206 1.4 petrol i was driving as normal and it just decided to cut out all the lights stayed on fine just lost power i put it down a gear an went 4 it but nothing a couple of lil pops from exhaust we stopped and turned it over its turning but like its not got compression and turning over fast a dont think its compression because i had to put it in first and use the starter to shift it into a lay bye so wouldn't say timing either when turning over its sort of a fast high pitch noise seems normal apart from that, would fuel starvation make it turn over funny am out of ideas if you have any would be much appreciated.