This is a two part question. First part, a week ago changed a universal fuel pump(cylinder was thin)to a Bosch fuel pump(much wider). Now I am experiencing a rough idle. Does the fact that I went from a thinner fuel pump to a wider fuel pump have anything to do with this rough idle.
Second part. Saw an advertisement for Bosch Super copper spark plugs, has anyone tried these or have any feedback on these sparkplugs?