Every time i hit bumps the right front knock - 1993 Ford Taurus

If the bouncing is in the front it is probably a strut.
If the bouncing is in the rear it is probably a shock
look for the shock to be oily indicating the shock is bad. But
usually if the car is bouncing two or three time after hitting a bump
the shock has either broken or come completely loose.

You need to replace the rubber bushing that the trailing arms fit into.

See if you can bounce car and replicate the noise. If you can, you should be able to find it, and put your hand on it. Stabilizer bushing are a place to look, both at the lower a arm and on the frame. If you narrow it down to the strut, it will need to be replaced. The front trans mount also goes bad, try putting it in drive with your foot on the brake and give it some gas and see if the engine moves an excessive amount.

The front chassis susspension rubber bushes are worn and need replacing..

if your knocking noise get whorse when your taking a sharp turn it means your front right cv joint needs replacing

-it could be the sawy bar linkages
-but also check to see if the struts are leaking or that it looks damp
-but because you said it doesn't look like it bouncing when you hit a dip most likely it could be that the struts are dead
-check to see the cars ride hieght that would give you a clue

The knocking noise on your van is front sway bar bushings

SOunds like a broken shock, or bad strut. Air bags or not, struts and shocks are what control bounce.

temper platt on top is loose or macpherson strut is loose

lower track control arm bushes