idel revving up and down

[jimrios]

I have a 2000 Toyota Celica GTS automatic. My car keeps idling from 800 rpm to 2500. While I am stopped or in neutral. I just brought it to Toyota today they hooked it up to the computer and said everything was fine. I was not able to make it happen at the dealer. Does anyone have any idea what I should do? Any suggestions would be greatly appreciated.

The car is bone stock. No modifications at all.

Please HELP!!!!!! Toyota couldn’t.

They said bring it in when it happens

[Twincam16]

Ha. I had the same problem with my AE86. I tried to take it to the shop but the problem stopped as soon as I pulled into the driveway.

It turned out that my coolant level was low.


Norm

[boroEF]

if the rev's drop and rise that much, it means u got air in the cooling system. bleed it

[Zich]

My engine did that when I forgot to reconnect the pcv valve before starting it.. check that

[jimrios]

Thank you for all the feedback.
Traded the car in for a new one.