I bought my re-manned injectors from Pensecola Diesel last Jan (hence trying to figure if they're the problem before the warranty runs out).
I'm not worried it's a timing issue, since I've swapped my (supposedly rebuilt) IP with a UHaul pump, and it made NO difference in the unburnt fuel smoke. I've avoided advancing it too far, since it did fine advanced in CA, but burned up my Berus on the trip to ID, and with the elevation higher, I just didn't want to push it. I'll play with it between 8.5-9+ and see where it feels best and gets the best mileage.
My originals that came in the truck never had any issues (except that they were the IH originals), that's why I saved them. I'm going to run by the Diesel School today and grab my old ones, I know I'll have the downtime this weekend to swap them in. Don't need a major improvement, just a real difference. I only suggested swapping in my old pump since I don't want the brand new one to kill the old injectors.
If it makes a difference, I'll be buying a set of NEW injectors, and sending the re-manned ones in for replacements, just to have back ups.