hl all, daughters polo, 05 plate, sounds Llke lt's runnlng on three, new plugs etc, what's the flrst thlng to check elecrlcal? 1400cc wlth about 50,ooo on the clock. thanks. any known faults Llke the colL packs on renaults?
Thats the first place id start.
If theyre the single ones, unplug them one by one until you find the duff one that doesn't make any difference to engine running when unplugged.