Idle has a mind if it's own?(help!)

[greenmachine97]

I swear, my idle has a mind if its own. and it frustrates the piss out of me!! Like when i first start it up, it idles at like 800-900(good). but then if i rev it or if drive it for a little bit, then it will idle at like 1500, or 1300, or 1100, or wherever. it just kind of decides where to idle whever. so then when it idles that high, i turn on my AC to bring the idle down a bit. The idle will drop to like 900 but then after idling for more than like 30 seconds, it will go back up to like 1500, then after about another 30 seconds, back down to 900.
Now my question is:
WHY IS IT DOING THIS
i know i am venting, and i guess my question is an oxymoron, but the idle is not rough at all, it is very smooth. the only problem, is that it idles different every time. it has only been doing this for about a week, since i reset my ecu, and i have been venting for well over 4 monthes. I plan on recirculating, but i cant find a tube that will connect properly, cause i have greddy upper piping with type-s BOV, and a dejontool hardpipe, and the stock pipe wont fit, i have tried.

but could this be an ISC motor problem? or what? thanks in advance for the help.

 

[blMuskrat]

My guess is recirculating on stock MAs + reset ecu.

your car is goning to be running rich because it thinks it's getting more air than it is, because your venting insead of recirulating (didn't see any MAs mods in your list). Also, because the ecu was reset, the car needs to "learn" all of it's settings over again. driving it around for a while should help with the last part, at least.

 

[Turbo_Frog]

I feel your pain except mine goes up to 1300 then down to as low as 200 with some bad shaking. I changed the IAC motor (Dont know what ISC motor is, Im guessing the same) and I idled perfectly for a good 3 months, now Im back to square one. I know my problem is because I am venting, but like you I cant find a decent pipe to recirculate with. Everyone tells me to just go to home depot and buy a piece of rubber tubing, but I want something that looks like it belongs there. So I would recommend changing the IAC motor and recirculating that BOV. Good Luck man!

 

[99GSTszeikus]

i tried venting today, and my car did the same things you are discribing, man do i love the sound of the bov but it's really not worth it in my opinion to vent if your car is idling funny.

 

[greenmachine97]

Thanks. yeah, and when i turn the wheel, when i have the idle set lower, the whole car shakes really bad an feels like it is going to die. i really hope that recirculating the BOV fixes it. any other ideas?
by the way, Turbo-Frog you have a beautiful car!

 

[Turbo_Frog]

Thanks Man! Before I got my wheels I would always stare at your gallery. I was going to get the same wheels you have but I decided to go with a gunmetal 5 star design. My car shakes terribly at a stop, its gets super low but never dies, and after it gets done shaking it slowly goes back up to about 1200 and you can hear my BOV whistling, and then it repeats the process. Trust me I will be recirculating ASAP, I just need to find a stock return tube or something similiar.

 

[greenmachine97]

Man, i hope recirculating it fixes the problem. i have a stock return tube if you want it. i cant get it to fit on mine though. i have Greddy Upper piping with a type-s , and a dejontool hardpipe. and the pipe wont fit on there. PM me if you want it.