Locate the fuel pressure port. It is usually located on the fuel injection rail, or near the fuel injector. Connect the fuel pressure gauge to the fuel pressure port. There are a few different ways to do this, depending on the type of fuel pressure gauge you are using. Make sure that the connection is tight so that no fuel leaks. 3.Turn on the engine and let it run for a few minutes. The fuel pressure will rise and then stabilize. Check the fuel pressure reading on the gauge. The normal fuel pressure for a 2002 S10 4x4 is
51.79psi with vacuum hose off at atmospheric pressure and 42.29psi with vacuum hose connected..
Turn off the engine and disconnect the fuel pressure gauge.
