We are baffled, so hopefully someone can help. 91 Accord. Has a horrible shimmy/vibration in the front end SOMETIMES. It can be so bad you can barely grip the steering wheel and it feels like the car is coming apart and then it can drive smooth as silk sometimes. No rhyme or reason to when it is there and when it isn't. We've checked brakes, rotors, bushings, bearings, springs, struts and just recently replaced tie rod ends. It is definitely front end. The only thing left we can think of is maybe a belt in a tire, but can't believe that would come and go, nor cause this bad of a vibration.
Any ideas?

 

welcome to the forum. Have you had a 4 wheel alighnment done on the car. ball joints?

 

That is a strange one,I have heard of tires with broken belts pulling but never wobble.check your lugnuts also.