rough idle. isc bad?

[marsh63]

the car has a rough idle so i took it apart and clean the throttle body. and all the sensors with electrical cleaner. the car still has a idle jump of about 200 rpm. and when it is hot it will die at all stops pretty much. is it my isc? or what do u guys think it is?

 

[meliketoball]

Well, if the ISC is bad like mine, it would throw a CEL (check engine light). Got CEL?

 

[RayBan GST]

change you IAC, but get someone who knows about our cars to change it or you will regret it later on .

check for boost leaks also. It could be that

after heating up the car the holes that usually closed will open further after heating

Good luck

 

[marsh63]

yeah i dont have a check engine light at all. whats the IAC?

 

[RayBan GST]

I A C Idle Air Control


Good Luck

 

[marsh63]

how much are those and where do i get them at. schucks and the other parts stores dont have them. do i have to go to a dealer? i dont really feel like getting raped on the price. should i buy one off of a junkyard car?

 

[meliketoball]

Go to the junkyard. I bet there is a lot of 1gs there compared to having 2gs there.

 

[voodoogsx]

change you IAC, but get someone who knows about our cars to change it or you will regret it later on .
check for boost leaks also. It could be that
after heating up the car the holes that usually closed will open further after heating
Good luck

Are you sure you don't mean ISC?
I second the checking for boost leaks and vacuum leaks....Vac leaks are notorious for giving crazy idle.
Also check that the mas is plugged in and is nice and snug...
DO a search for isc to see how to check it, but If anything I think you can unplug it and see if your idle is still like all over.....if it still is, it may not be the isc.

 

[marsh63]

i dont even know where the isc is i took my tb off and cleaned everything but i dont know what sensor is what. ill try doing a boost leak test but i dont think it is that cause it only happens when the motor is hot. on cold days it works fine till it warms up all the way.

 

[voodoogsx]

i dont even know where the isc is i took my tb off and cleaned everything but i dont know what sensor is what. ill try doing a boost leak test but i dont think it is that cause it only happens when the motor is hot. on cold days it works fine till it warms up all the way.

google search dsm and isc, there are plenty of pics
also search for fiav that could be the issue as well....mine died and caused some crazy idle issues as well...though my idle was high, not low...

good luck!!