I did find this info which almost fits my issues to a T ....
Aeromotive AFPR problems | DSMtuners
and it came down to the gauge being liquid filled not being accurate and that aeromotive states not to use liquid filled gauges on their web site. And now that I think about it I had a fuel lab regulator on my other z with no fluctuations with a liquid filled gauge .....I’ll be adding a T in and add a regular gauge and compare the two
This may help as well.
https://www.verociousmotorsports.com...-Filled-vs-Dry