basically the engine is very healthy, just been set up at power engineering 2 weeks ago, shes running 176bhp.
mods are, Exhaust, air filter, Power engineering Chipped it when setting it up, bleed valve ( i never touch the bleed).

was fine for the past 2 weeks, but now wont idle at all, i have to keep the revs up myself, the car pops and bangs out the exhaust a bit more than normal aswell.
litterally if ur coming up to some traffic lights or anything or u brake and the revs drop she stalls, sometimes she starts again , but others she wont start for like 1 min

does anyone have any ideas, as the car is pissing me off to the extent that i want to sledge hammer it, ive decided to sell it for sure now, just want her fixed and running mint again as she was