So I had another post with different symptoms I have fixed those so far with the fluctuating idle. New symptom is maybe 4-6min of running the car getting it up to temp my idle RPM is 1kish give or take a few hundred. My brake peddle will gradually depress all the way to the floor. The only way I can get it back is to put on the e-brake.

What I have done recently, Disconnect all of my ABS harnesses along with fuse/relays since my ABS was not working.

 

check the vacuum hose from the booster to the intake mani
are there holes? leaks?
do you have the check valve on going the right way?

 

Brake booster is fine I took off the hose checked the valve covered it with my finger still had the idle issue again!. I have no CEL could it be my TPS the up down idle started again, I have no vac leaks, coolant is completely bled. Could it be a tuning issue? I guess it wouldn't hurt to take it to me tuner...

 

Ok here is a video of the problem maybe it could help to find a answer. The first half is the most important I thought my cell could pick up the engine rev but apparently not..

 

yes it can be the tune. in the tune you can adjust the iacv activity and idle....mine is goofy to from having 3 dif people thinking they know what there are doing tune my car