Help with my 2 Lomeli lines from Mexticacan Jal.

It seems like I have hit a roadblock in my research and would really appreciate help or a pointing to the right direction. I feel like I've exhausted every possibility on Familysearch. My first Lomeli is my direct paternal line.I cant seem to find anybody beyond Jose Rafael Lomeli (married to Maria Olaya Manriquez, late 1700's i would presume) father and mother to Jose Maria Lomeli born 1805(married to Maria Vidala Jauregui 1808).
My second Lomeli line comes from Maria Vidala Jauregui's mother Maria Paula Lomeli.Her father is Juan Angel Lomeli (1762)and his father was Gaspar de Lomeli(married to Marsela Casimira Marin).These lines are from Mexticacan Jalisco...possibly Nochistlan.It seems like many of my other family lines im tracing seem to blur or totally disappear in the mid or late 1700's.Im not an expert so any help would be greatly appreciated.
thank you, Alejandro Lomeli El Paso, Tx