my car is idling up high without me pushing gas pedal. on 1999 Lexus ES300

It also jerks when I put it in gear, what causes this?

3 answers 2 comments
could be a vacuum leak. get a shop to check it for you. difficult to troubleshoot here without seeing it.

Roy
Thanks Roy, I plan on taking it to a shop
COULD BE VAC LEAK OR BAD IDLE AIR CONTROL SYSTEM. HAVE IT DIAG BY YOUR MECH
thank you, very much!
my car changes speed independent of my inputs on the pedal