Fuel Injectors rail driver side, same look as the fitting to put air on your trucks tire.................Fuel rail is the tubing that supplies fuel to the fuel injectors..
Attach a fuel pressure gauge to the service port on the fuel rail.
The Villager does not have a test port. You need to tee into the line at the fuel filter.
There is no test port.
The fuel test port on a 1997 Suburban is on the engine under the hood. It is located near the fuel lines.
The Villager does not have a test port, you need to tee into the line near the fuel filter to test pressure.
If that is throttle body fuel injection, there is no fuel pump test port. You have to fabricate with some fittings and tap into the fuel line at the fuel filter.
on the fuel rail. Most do not have a test port. An adapter will need connected into the supply line.
TBI didn't have one, you have to tap into the fuel line at the fuel filter with adapters to attach a pressure gauge. CFI has a test port in the fuel line on top, in back of the engine.
There is an adapter that is put in place of the fuel filter that has a test port that the fuel gauge hose will fit too. Might be able to get one from a parts store.
There should be a fuel pressure "test" port behind the throttle body. Test the fuel pressure at the test port using a fuel pressure gauge. If the engine starts using starting fluid and doesn't start without, and the fuel pressure at the test port is normal... you have something else going on. It COULD be the injector, but don't assume until you've tested other stuff.
By the fuel pump
probably a 7/16 by 20.