Originally posted by drg84
Just a few things i either missed or something. 1) is it the EFI 5.0? If it is, I had the same problem. Turned out there are two different designs of alternator for that motor. You may want to look into this. Also, streets is right about the pull and die syndrome. Unless you own an AMC. We're dinosaurs. Finally, ther was just a massive recall on the ignition module for the ford V8s. Causes cut-outs, hard starting, ignition problems, you may want to ask your local ford garage about this.
The recall affects 92,000 of its 2003 S-Series Super Duty Trucks and Excursion SUVs for a ground problem on the battery cable that could cause problems starting or melt other nearby parts;this is from ford