- Alleged fuel pump failures can often be traced to a faulty fuel pressure regulator instead of (or in addition to) the pump itself. To avoid unnecessary warranty returns and comebacks, WORLDPAC strongly recommends testing (and, if in doubt, replacing) the fuel pressure regulator before considering the diagnosis of a faulty fuel pump to be complete and correct. Includes Fuel Level Sending unit. - In-Tank - W/o Fuel Level Sending Unit - Alleged fuel pump failures can often be traced to a faulty fuel pressure regulator instead of (or in addition to) the pump itself. To avoid unnecessary warranty returns and comebacks, it is strongly recommended testing (and, if in doubt, replacing) the fuel pressure regulator before considering the diagnosis of a faulty fuel pump to be complete and correct. - In-Tank Assembly - W/o Fuel Level Sending Unit - In-Tank Assembly- W/o Fuel Level Sending Unit - w/ Soft Top -