Anyone ever have any issues running an 8 pulse sensor with the GMPP E67?

I got the same 8 pulse sender I always use for conversions like this, Dakota Digital. The speed is erratic or does not work. If you spin or drive slowly there is nothing. If you, from a dead stop, accelerate quick the speedo works. Once working it works great. If you start slowly with nothing and then mash it, you still get nothing. I wonder if I have a bad sensor? I tried testing by driving and manually with a drill.

Just thought I'd try here while I wait for a second sensor to try. I need the speed for the GMPP TCM to work.