When I worked at the dealership We used to have to do alot of ground fixes,Bad ground made things not work properly and most of the time the car had bad acceleration.

If yoru worried about redo your stock ones first..

Remove the ground from the body or engine contact surfaces,(One at a time)

With a wire brush or sand paper clean the contact area on the engine bay or engine,drop some hot solder where the metal connector meets the wire BUT make sure its clean and has no corrosion,

Wires can get bad corrosion inside you cant tellmuch by looking at it from the outside but once you peel the wire covering back you will know..


Try to do this on your stock grounds BEFORE spending $4 on new ones,I have been looking into these ground wires latley buy some company called Sun ( Something)