Was having the same issue, turned out the alignment was toe out.
Originally Posted by Mackdog
Ok, so I have the car (2001 taurus flex fuel) jacked up right now to see where the popping noise is coming from on the front end. When I took the front drivers side tire off, I noticed that the inside of the tires
is worn down badly, in fact so badly that the cord is showing through. I am about to go to sears to get that tire replaced today. I read on here about how the tire wear could be ball joints, and I jerked on the rotor
at the 12 and 6 oclock positions, and even tried prying on the lower ball joint with the pry bar, but the ball joint seems to be tight. The rubber boot on the outside of the ball joint is rotted away, but I can not see any play in it. The CV
joints appear to be tight, and only have very little in and out play. The stabilizer link that is behind the strut seems to be tight too. I can't figure out what is causing the tire wear and the popping noise.