Hi my car rpm is fluctuating, I have got the throttle body serviced several times but the problem does not fix. I have also tried changing the chock sensor but that is not helping me out, have also tried completely replacing the throttle body but all in vain.

the rpm fluctuating ranges between 700 to 1500 and sometimes the rpm stucks at 1500 or more.

Please advise what else I am missing out!!