Thanks all, she only has 28k on her so I think anything would just be from sitting around.
There is no throttle lock screw, and I feel like the TPS switch is pretty good (can I take that apart and clean it?)
I just read Frankenduck's PDF about cleaning the throttle housing and I never took the whole master cylinder off when I cleaned that, so I am going to redo that and clean that entire housing out and check the cable condition in there.