Joined: Nov 2016
Toe problems can definitely make a car's handling 'darty' and weird too. But given that he was replacing his doughnuts, chances are, that's where this problem came in, so my money's on caster here. Ever push a shopping cart where the front wheel's gotten punked on a curb or pothole? The wild flopping and gyrating is because of negative caster, with the wheel bent backward. The wheel WANTS to turn, and self-steer to any direction but straight. With toe problems, the car's tires scrub and squeak a lot, even at low speed cornering, and you get very rapid tire wear. In my experience, toe-in tends to make your car want to pick a direction to turn, and stay with it. Toe out makes your car mostly eager to go 'straight(ish)', but in a very vague, wandery way. In either case, with extreme toe problems, you'd notice as soon as you started rolling. Caster problems are often less noticeable at low speeds, but progress to something quite frightening as you accelerate.
As I'm writing this, it occurs to me that I've driven a lot of cars with improper alignment over the years, in order to become familiar with 'what's wrong with this thing?'. *laugh* One thing I can say with great certainty: When you know that there's something wrong with your car's handling, regardless of the symptoms, check your parts first. If you already know they're fine, or they're fixed to be that way, THEN deal with alignment, and get everything right when you do it. One adjustment often affects another, so just get it right, and then enjoy.
I smile a lot. It makes people wonder what I'm up to...