Fuel Pump Output Check

• A Schrader valve is located on the fuel rail for easy access to the fuel pressure. See Figure
• See Fig 1for fuel feed and return line identification.
• Engine does not have a fuel pump prime connector. Rather, ALDL terminal G is spliced directly into the fuel pump power circuit. Hence, the fuel pump can be manually powered by jumping a power feed to terminal G. See Fig 2

See chart A-7 to check fuel pressure and diagnose any incorrect fuel pressures. The A-charts are not contained in this article. They can be found in the appropriate article in the ENGINE PERFORMANCE section.

Fig 1: Fuel Feed and Fuel Return Line Identification (2.8L)

Fig 2: ALDL Terminal Identification (Terminal G, Fuel Pump)