Glad you were able to fix it.
As for the filters, double check the Holley instructions, the one you have is what they recommend for the pre-pump filter only.
Guessing you actually meant 33033 as a 33003 is a lawnmower filter... either way 33033 is only a 20 micron filter so not really rated for EFI. (Holley states a minimum of 10 micron rating for EFI fuel filters).
I would swap the injectors and see if the issue follows. I would bet you have a...