To find the correct specification, you need to know your engine type (e.g., 4.2L V6, 4.6L V8, 5.4L V8). Once you know the engine, look up the fuel pressure in a reputable source like a Haynes or Chilton repair manual, or a factory service manual. These manuals will provide the exact specification for your vehicle, including the proper testing procedure.
Attempting to diagnose fuel pressure issues without the correct specifications can lead to inaccurate readings and potentially damage your fuel system.
