Others have mentioned a fuel problem. I don't know how the V10 compares to the old straight 6, but had one that was doing the same thing. After several visits to different shops, finally had one suggest carbon build up. The owner suggested putting in on a machine to burn a cleaner through the engine. He did not think it would work and would probably have to pull the head. But half way through the treatment we were standing by the truck when the engine sound noticeably changed. No more low rpm miss.
I don't know what the machine is called or what is uses. But the problem was definitely fuel related.
