Is highway wander caused by caster?

[Snubba]

Its time to rise this thread from death. "Old thread, heed me, ARISE!"

OK, I just got my car aligned. The rear was a tad out of spec. The shop did all 4 wheels. They used EZ-Shims in the back. So before, I had a rear thrust angle of 0.24, now its 0.08. They gave me 0.28deg toe-in rear and 0.14deg toe-in front which is pretty close to factory specs. They have a nice alignment system. I haven't noticed any difference except maybe its more twitchy above 70mph and that could be due to the increased toe-in the front (changed from 0.07 to 0.14deg). I took out the EPS fuse and steering still feels disconnected at 55mph. Its no fun for cruising.

So I delved into the problem and found that EPS uses a torsion bar in the steering column to sense steering effort. So basically, Yarii are driving down the road with a torsion spring between your wheel and the road!

I made a whole post about it found here:
http://www.yarisworld.com/forums/showthread.php?t=39719