On Wed, 10 Aug 2016 19:55:50 -0700 (PDT), dsi1 >
wrote:

>On Wednesday, August 10, 2016 at 2:31:23 PM UTC-10, Bill Vanek wrote:
>> On Wed, 10 Aug 2016 15:01:08 -0700 (PDT), dsi1 <dsi1yahoo.com>
>> wrote:
>>
>> >On Tuesday, August 9, 2016 at 1:49:28 PM UTC-10, wrote:
>> >> dsi1:
>> >>
>> >> Look up online "2011 Hyundai Sonata wandering" and you'll
>> >> understand why the concern. Although most of the issues
>> >> were resolved by the third model year of the YF body Sonata,
>> >> it is still good to havr alignment checked, especially on a
>> >> used one with 30,000 miles.
>> >>
>> >> Another contributor to the wandering was the electric power
>> >> steering and what mode it was set in at the factory. Mine was
>> >> set to 'Soft'(maximum boost, minimum driver effort). I had my
>> >> dealer set it to 'Sport'(minimum boost, most driver effort needed
>> >> to steer car). In soft, even slight changes to the road angle, or
>> >> a mild cross wind, would wrest the wheel from drivers' hands!
>> >> It was reminiscent of the 70s 'one fingered' steering on
>> >> full size models.
>> >>
>> >>
>> >> Sport mode was a huge step in normalizing the handling/road
>> >> feel of my Sonata, but I figured finding a way to maximize
>> >> caster - within specs - would really ice the cake.
>> >
>> >Just tell the alignment guy your problem and he'll probably just change the toe-im. I don't know if they'll be in spec but that should improve straight line stability. The young alignment guy might not want to do it so find the oldest, most ornery-looking coot in the shop and ask him. The price you pay will be increased tire wear.
>>
>> Changing the toe will help only if it's so far off right now that the
>> car is wandering back and forth. The only things that affect steering
>> return to center are camber, caster, and kingpin inclination.
>
>I believe that the OP is experiencing wandering back and forth.

He is, but in a subsequent post we can see that the toe is okay. He
does have a thrust angle issue - it's non-zero, but I don't know how
far off is too far off.