Save yourself a lot of hastle. Palomar Engineers (http://www.palomar-engineers.com
) sells snap-on beads just for this type of problem. Their FSB-1/2, and snap cover SBC-1/2, will cure most of the noise. It might take a couple to do it, however. Mount them on the injector harness where it crosses the back of the firewall. This spot is a little hard to get to, but worth the effort.
There is a TSP on this problem, but I've never read it. You can get a copy from your Ford dealer, or down load it from Helms.
Alan Applegate, KØBG