Bro, when cutting junk food out, NEVER go cold turkey. You're just asking to go into relapse and binge yourself on them at some point in time.
Gradually replace the chips with something like celery and cottage cheese. Half the portions up - with what used to be your 'usual' portion of chips, split that portion in 1 part chips, the other celery and cottage cheese.
As you palate adjusts, you'll eventually have no 'cravings' for them any longer.
Oh and BTW, changing diet is 100% MENTAL...if you keep telling yourself "I gotta have this kind of food, or I gotta have that" then that's exactly what your subconscious mind will have you do. You have absolutely NO NEED for those high-glycemic, blood sugar spiking chips. THey'll kill your fat loss efforts. Just build your mind up to get rid of them and slowly phase them out of your diet.