Yes you can. Just run a piece of rubber fuel injection hose from the fuel pressure regulator outlet to the main fuel line that runs to the fuel rail and clamp it... Or you can use a fuel line from a late '98 or '99 Neon from the junkyard that way you will have quick disconnects.
The fuel pressure range for a 99 Astro van is between 40 and 45 psi. The fuel pressure regulator is located at the back of the motor.
The fuel pressure, for your 1999 Chevrolet 4.8 liter engine, should be between 16 and 18 pounds of pressure. A lower feel pressure can because by a plugged fuel filter.
under hood, on fuel rail which is connected to each fuel injector there should be a valve that looks like a tire valve. That is the shrader valve, test fuel pressure there.
60 to 66 psi with pump running, key on, engine off.
The pressure regulator is located on top of the intake manifold on the fuel rail
the 98 and 99 Plymouth neon's do not have a fuel filter, they have a fuel screen that right in line with the fuel pump. I found this out only yesterday when I was had to replace my fuel pump. If your car is not starting and blowing fuses for the fuel pump, you need a new fuel pump.
The fuel pressure regulator is built into the top of the fuel pump module in the tank.
60 to 66 psi.
55 to 62 LBS. No lower and no hayer or you will have starting are running problems.
On the top of the fuel tank towards the front.
Your 99 Neon may stall because the battery moves to one side when you turn. You should try tightening your battery cables.