To expand on this fuel pump functions mostly at 55-59 PSI
as seen the sender then is only reporting aprox from 2.73 to 2.88 volts

Not much margin of error for any degrading of sender output

VOLTAGE 0-100 PSI
2.73 ........ 55
2.75 ............ 56.25
2.80 ............ 57.25
2.85 ............ 58.25
2.88 ........... 59.37

In the graph below was recording the output of the sender with a digital voltage meter which outputted the voltage values during a testrun to a laptop as a recording
which then is imported into Excel spreadsheet.

As seen the sender was reporting as low as 2.72 volts which equals 55 PSI and as high as 2.87 volts, i.e 59 {SI
This was when sender was cold gauge reported 59 PSI but as sender got hot output was degrading, reporting 55 PSI when in fact
when sender is mounted to a colder location the real reading is 57-58 PSI