Typically, to change the valve you also have to lift the engine off the right mount slightly. While your underneath the car, check to make sure the pipe running from the right exhaust manifold up to the valve is tightly clamped in place.
Also, I see you're in Bakersfield. If you have to undergo the enhanced smog check in Bakersfield, you may have a hard time passing on EGR even if the system is working properly because of changes the CARB made to the maximum allowable emissions.
If you run up against that problem and your EGR system is working properly, the only solution is to install a custom calibration.
