Bad or good EGR Valve?

The hose should only have vacuum present when the throttle is open and you may not be able to check the valve with a vacuum pump.as it may be a back pressure dependent EGR valve - needs exhaust back pressure and vacuum to open. The best way to test it is by holding a finger under it against the diaphragm and blipping the throttle. If you feel it move the valve and control elements are working. The next thing to check is flow. Push the valve open at idle with your finger, The engine should stumble and preferably stall. If it doesn't there's lack of flow through the valve or the passages it controls.

The code is set when the computer knows the valve should be open but it doesn't see a drop in manifold pressure at the MAP sensor.

 What is wrong with your car?  What is it doing?  Does it start?  Is it stalling?  What is the numerical code?  Is the check engine light ON?

Since you have no clue how to check an EGR valve I can see why you get rude answers. If you can't push the EGR diaphragm up with your fingers get a vacuum pump and draw a vacuum on the EGR valve to see if the motor stalls.

I don't think you understand what an EGR does. Exhaust Gas Recirculation is an Emission controller, it mixes exhaust gases with the fuel/air mixture to reduce the emissions. On your car it uses a Temperature regulated vacuum valve to open the EGR only when it's warmed up. If it gives EGR when it's cold, it will stall. The problem with all EGR valves, old one even more. is that Carbon Buildup in the Pintle Valve will prevent it from closing all the way. And exhaust gases will always get thru into the intake, which is not good. Spray the mounting bolts or nuts and the flange nut for the exhaust tube, if equipped, with PB Blaster or other good penetrating oil and let it sit for hours. Come back and remove the tube first and then the mounting hardware. Pull it off and look at the valve and the seat where the valve sets into. There will probably be a lot of caked on carbon. You can use a drill mounted wire brush or oven cleaner to get the stuff off. If you're handy you can make a block-off plate to bolt on where the valve was. It will just be a blank with holes in the same shape as the mounting base of the valve. And just put a screw in the vacuum line that you removed. Look up EGR Block-off Plates/EGR Deletes for your car to see what they should look like. You certainly are exempt from Emissions tests.