Direct injection pressure is measured with sensors, and the signals are used to determine pump speed and/or volume.
Use a scan tool that can look at special direct fuel injection parameters and perform bidirectional tests.
Let’s see if you have prepared and know the answer to this ASE practice test question. This video is sponsored by Carter.
If the fuel pump is replaced, any filter or screen should be inspected and replaced. This video is sponsored by Carter.
The earliest effort to improve fuel-pumps was to install a series of ballast resistors. This video is sponsored by Carter.
Andrew Markel discusses fuel pressure, and the different ways to diagnose issues without using a pressure gauge.
All too often, technicians assume fuel pressure is “good” without actually measuring it. If the engine runs, they assume the injectors are getting adequate fuel pressure. If the engine cranks but won’t start, and they depress the service valve on the fuel rail and some fuel squirts out, then they assume the injectors have pressure.