With the engine cold and off, try moving the linkages by hand under the hood. See if it returns to the stop easily.

The idle speed being wrong might be a bad ECU temp sensor? Or other fault. The blink codes might be helpful.

-J

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1991 350SDL. 230,000 miles (new motor @ 150,000).

Tesla Model 3. 136,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.