I will start the car and it wil jump to about 1200 then drop to like two hundred and then jump back to around 1200 and warm up once warm the car will idle at around 8-900. I will pull up to lights and the cars idle will jump to 1200 and drop and do the same untill the car eventually has a normal idle. Just today the car's idle dropped to around 500 and I took the car home. I am very concerned the car is tuned and it has been doing this since I recieved it not the sudden drop in idle. Any help would be much appreciated.

 

What kind of car/motor is it?

any check engine lights?

Cleaned the screen in the IACV?

Tightened the plunger in the FITV?

 

yea i have the same problem. And people have told me to clean out the IACV. Imma do it this weekend. But it should be that or the FITV

 

Well i cleaned out my IACV. And i still have the same problem. So now imma try to clean out the FITV