I have a 1992 Saturn SL2 and I just put in an order for an EGR valve but it won't be in until next Wednesday. The old valve is stuck open and does not create enough vacuum to keep the car running while I put it into gear. It drives fine when I disconnect and plug the vacuum hose running from the solenoid to the valve, but my question is if driving without the EGR valve will negatively effect (ruin) any other systems in my car? What does the valve do besides reduce emissions?