#1
so my guitar has the stock pickups in it. do cheap pickups give you feedback more easily than say some quality seymour duncans or EMGs
Gibson Explorer
Jackson Soloist SL3
Orange Tiny Terror
Mesa 2x12
#2
^ In some cases, yes, since sometimes cheaper pickups aren't properly or effectively potted (partially sealed in wax). Also, if your setup is completely prone to all sorts of noise and interference, it can also make you a bit more prone to feedback (the sharp whistling kind, not the cool Hendrix kind).
Hi, I'm Peter