1. Worn or damaged suspension components: Over time, suspension components such as ball joints, tie rod ends, control arm bushings, and shocks can wear out or become damaged, leading to looseness and wandering of the front end.
2. Improper wheel alignment: Incorrect toe, camber, or caster settings can cause the vehicle to wander or pull to one side.
3. Incorrect tire pressure: Underinflated or overinflated tires can affect the handling and stability of the vehicle, including causing front-end wander.
4. Worn or damaged steering components: Worn or damaged steering components, such as the steering rack, steering gear, or steering linkage, can cause the vehicle to wander or become difficult to control.
5. Loose lug nuts: Loose lug nuts can cause the wheels to become loose, which can lead to front-end wander and other safety issues.
To address front-end wander on your 1996 Ford E-150 van, it's important to have the vehicle inspected by a qualified mechanic who can diagnose the root cause of the problem and perform the necessary repairs or adjustments. This may involve replacing worn or damaged suspension components, performing a wheel alignment, adjusting tire pressure, repairing or replacing steering components, or tightening loose lug nuts. It's also important to regularly maintain and inspect the vehicle to help prevent future problems and ensure safe handling.