OIL Pump on 1993 Toyota Land Cruiser

the oil pressure gage has starting to show low oil pressure.I can tell the different in the way truck run and idle now.I need to know if i had to change out the oil pump how big is that job and where it's located on that truck.

Asked by for the 1993 Toyota Land Cruiser
first of all, get the pressure verified by a shop with a manual test.
if the pump is worn, chances of it causeing driveabilty issues is very low.
it sounds like you have 2 separate issues that need to be addressed. have a shop check it for you to verify.