Just installed a new tps. fault code is gone but idles at 1800 rpm. check engine light does not come on but idle never goes down

run the fault codes and check for an accelerator position sensor fault or an throttle actuator motor problem

Don't need a dash light on, to check for codes
& have some in memory

Have to look at all data & the related modules

try having the fault codes read first then fixing the faulty sensor
indicates a fuel pressure or injector problem

Sounds like a faulty mass air flow sensor.Try spraying the small thin wires with a nono-chlronated brake cleaner then let it dry for 10-15 minutes then re-install.Make sure to reset the computer whether you clean it or replace it with a new one.

could be a dirty throttle body or the idle control motor

white smoke out of the exhaust would be a sign that it is burning coolant... if it goes away after it warms up, it could just be condensation inside the exhaust pipe. 1800 rpm is a very high idle, maybe have your IAC motor on the throttle body checked... check engine light? if so have the code read at your local auto zone.

a better question is why is idle so high? could be a vaccum leak or other issue. Adjusting the idle circuit is not the answer. Since the check engine light did come on perhaps you can retrieve a trouble code...maybe even a bad tps

Do you have a check engine light on? First thing I would do is unplug the IAC motor when the engine is warm. If the idle speed doesn't change you have a vacuum leak or a bad IAC motor. If the idle speed goes down you might have a bad TPS or IAC

Sounds like you have a vacuum leak somewhere after the throttle body.

The person that told u that it was the tps and idle air they we're completely right!! The tps sensor is what makes it do that. If you pull the air intake of there's 2 holes on the throttle body. Plug one of the off with your finger while the engine is idling high and it should come down mine was the top hole. If it does go down just get a new tps sensor. and the back sensor on the intake to be safe. or the ghetto way is to plug the hole off, not my sugestion.