Cars ran fine for 65 years without EGR valves and so will yours. If you are worried about it, remove the valve assembly from the intake manifold and carefully clean the sliding “gate”. You can usually manipulate the valve with your fingers to check its operation. Also clean out the cavity and gas ports where you removed the valve from…
The only time this valve is opened is when you are at a steady cruising speed. At idle or under acceleration it is closed. If it sticks open at idle, it will cause rough ideling and stalling…