Maybe bottom ball joint(usually the one that will break off) usually or maybe spring not seated correctly in control arm pocket. Should be able to hold your hand on the affected part or area and feel it perhaps while car is not moving. Check it up on stands if it will do it without a load on the suspension.
The guy I bought it from last year replaced a bunch of frontend parts including ball joints but thought maybe he installed a defective one. I will check this when i get home from work. Went for a test drive last night and noticed the popping when turning left and the car even seemed hard to turn left at times. Hope it's and easy fix cause my son is ready for his car. Thanks for the advice.