Very Strange Idle/Stalling Issues

[Passion 4 Speed]

I searched this up but i cant find any that is similar to mines..Heres the deal
This only happens at night or should i say when its cool but i live in Fl so only at night it gets cool.
My car would idle bad after driving like maybe 15 mins or soo and the motor would turn off..I would start it back up and the car acts like nothing had happen..same routine happens again but sooner. But i notice that this doesnt happen when the fans are on or a/c..So when it would start to idle bad again i would turn on the a/c and wala no dying idle/stalling problems..but what it would do is rev up and down by itself 800 rpms to 1100 rpms..and everytime it hits 1,100 rpms i hear a 'tick" sound coming from the engine bay area and it dies back down to 800 rpms and jus keeps on doing this..So i popped up the hood and try to listen where this "ticking" sound is coming from, and it was around the intake manifold area, seems like it was coming from under the manifold ...but i cant tell because i was doing this at night. Is there any sensor by that area that u guys know of?
CEL light is on but i was told from the dealership that i bought this car from they told me that its the egr valve so they bought a new one but that still didnt fix it so i jus blocked the egr valve off cause it was giving me a really bad idle.
My cars a automatic, i have a k$n filter, and a high flow muffler..I replaced spark plugs/wires 3 months ago..Any possbilties of what this is?
sorry for the long note..thanks for your time

 

[4g63forlife]

Check the vaccum lines and or the I.S.S.C motor sometimes it goes,and really start to F*&k up cause it's a stepper motor that tries to compensate for a load a/c,fans, head light etc. by regulating the air coming into the throttle body when the butterfly is closed, that could also be that clicking you hear, that's all i can think of at the moment , sorry i don't have more info , but i hope this helps.

 

[Passion 4 Speed]

promblem fixed..it was a vacum hose under the radiaor cap/hose, it was barely on got lose some how... doesnt idle bad with or with out the a/c on..no CEL so far and no stalling so far..i hope this solved my problems..thanks for your help!