GTA stalls on sharp left turns
 

Ok, my fuel pump was on its way out so a new fuel pump was installed (2 weeks ago) and recently I have noticed that on sharp left turns, the car will hesitate for a few seconds. At first I thought it was because I was low on gas, but it does the same thing on a full tank.

Is it the Fuel Pump? Or is it something else?

if it just started doing it then it'd be logical to think it had something to do with your fuel pump repair. i'd recheck my work.