DaveBen
SDD Senior Member
Dennis is right, you need to have a scan tool that reads Ford diesels to find out what it going on. I have an Autoenginuity scan tool that uses my Windows Laptop. It is not the cheapest scanner out there, but this will do the buzz test and other things. See here: AutoEnginuity® - OBD2 Scan Tool - Professional PC and PDA Diagnostics for more information.
Dave
Dave