ok i have an 85 and when im driving along especially in the rain my car will jerk to the left or the right if i go over even the tinyist dip in the road,i dont have power steering so i wanted to know whether this was a normal thing or i need to tune my suspension,which by the way is still original all the grease fittings are blown and all the bushings are cracked,the jerking get very bad in the rain,thanks for any help

 

Firs thing to do is inspect the steering, inspect the idler arm for up and down movement, they have plastic bushings in them that wear out. Also remove your shocks and struts are what keep the tires with contact with the road. Also tire with a bad cord in it(seperating)
will cause same problem. rx7doctor

 

It's not normal to that degree, this is called bump-steer. The amount any car will have varies with the quality of it's suspension but what you're describing is excessive. Your tie-rods are too far out of alignment with the lower control arms.

With the steering wheel locked get the front wheels off the ground with the car secure (jack-stands). Place your hands on the tires at 9 and 3 and work them back and forth with some force. Either you or a helper should eye-ball the steering linkage, you'll see the problem(s). In any case if your front end is this bad it's time for a rebuild and alignment.

As for it being worse in the rain, you do have tread on your tires right?

Vernon

Test the shocks and struts by bouncing the car by hand at each corner, get it cycling (up and down0 as fast as you can then let go and observe how many times it cycles without you. If the shock/strut is good it shouldn't go more than once more, if it does they are toast.

 

ill try those things thanks guys ,as for my tires theyre good tread but i have yokahuma's on the right and pirelli's on the left side

 

Thats most of your problem, cannot run 2 different tread designs on a vehicle. rx7doctor