AE71bangbang

it did work fine for a little after the had fixed it reason i had to get it tuned was old mate who has the rolla has a carb kit put throu it while it was sittin there when i got it it was idling high and revving very odd no vaccum leaks, carby float has been adjusted when tuned, could be dirt in the tank and fuel filter,,

I bought an AE71 1.6 manual iv had the carb re tuned and timing done but now i have an issue that while driving its trying to stall/hunt,, it keeps going still has power but randomly it plays up like it has stuff in the fuel?? the car sat in a garage for 2 years before i had bought it could it be a fuel issue or points issue maybe?