Is that the plate over the throttle body? It's not stuck---it is funny you would mention that. It actually seems to me that there is not enough resistance---the plate seems to move too freely. How much resistance should there be? Maybe something has failed (a diaphragm? Maybe it got chewed?) If it's not getting sucked open when it should be, that would be the same as it being stuck closed. I need to check the one on the '89. I also need to watch how that plate is supposed to behave when starting/running. Thanks. Regards, Eric