Update, my truck has been in the shop since Monday. They used some kind of camera and have ruled out a bad CP3 seal. Today they will put UV dye in the fuel filter, remove the valve cover and with a UV light see which injector/s light up. Once isolated then the injector/s that are leaking will have to be replaced, maybe all of them, who knows.
Sag2,
since I have the same problem, please expand on your test. When you look for a dip next to each injector, what are you looking at/for.
Any help would be appreciated.
K5IP