A/C is throwing my idle all over the place??

3.8 GTeater · September 2nd, 2010, 09:44 PM

My car runs fine when the AC is off but as soon as I turn it on it either revs up to about 2k rpm or drops down to 400/500

I found my vacuum leak and plugged it so it's not that.. Any suggestions?

shelton gt 500 · September 2nd, 2010, 09:48 PM

A.I.C motor. replace it or clean it.

3.8 GTeater · September 2nd, 2010, 10:00 PM

Oh, okay

lol

ESG-642T · September 2nd, 2010, 10:08 PM

It's prob a number of things honestly.

Mr. Red Pony · September 2nd, 2010, 10:31 PM

sounds like a common problem people get after the windstar. I have no way of proving this, but I see it as the computer bumping up the rpms to keep them from dropping with the pressure from the A/C being turned on.

BlueScreaM · September 2nd, 2010, 11:41 PM

Its the A/C idle adjustment solenoid it is what raises the idle when the compressor is on.

btw where did you get the black grill thinking about swapping them out

XXGREGXX · September 3rd, 2010, 02:43 AM

the black grill looks like a mach 1 grill delete.

Google it.

ESG-642T · September 3rd, 2010, 03:28 AM

Originally Posted by XXGREGXX

the black grill looks like a mach 1 grill delete.

Google it.

I don't think it is ;D

southfour! · September 3rd, 2010, 03:58 AM

Originally Posted by ESG-642T

I don't think it is ;D

looks like a black billet with the tri bar pony emblem from AM?

ESG-642T · September 3rd, 2010, 04:01 AM

Originally Posted by southfour

looks like a black billet with the tri bar pony emblem from AM?

How about some sort of black mesh/chicken wire and the emblem

BlueScreaM · September 3rd, 2010, 11:26 AM

[QUOTE=ESG-642T;3128730]How about some sort of black mesh/chicken wire and the emblem

[/QUOTE

Thank you, at lease someone noticed that!!

S

ESG-642T · September 3rd, 2010, 12:15 PM

[quote=Ahoboscheese;3129018]

Originally Posted by ESG-642T

How about some sort of black mesh/chicken wire and the emblem [/QUOTE

Thank you, at lease someone noticed that!! S

I kinda knew it before I posted...

goren813 · September 3rd, 2010, 12:49 PM

I don't think its the windstar, as plenty of Stangs have the issue stock.

BlueScreaM · September 3rd, 2010, 01:13 PM

Originally Posted by goren813

I don't think its the windstar, as plenty of Stangs have the issue stock.

It would help if we knew it did this right when the windstar was put on or after she did it. My friend did the windstar swap and she replaced the solenoid and it works fine it just might be timing.

0949er · September 3rd, 2010, 08:54 PM

lol at all the random answers....

its called the I.A.C. stands for "Idle Air Control".

mcqueen · September 3rd, 2010, 09:39 PM

I've had the same issue with mine since I bought it. I've just learned to leave it off and keep the windows down, and I actually prefer it that way now.

Originally Posted by 0949er

lol at all the random answers....

its called the I.A.C. stands for "Idle Air Control".

If the idle was screwy with the a/c both off and on, I would agree. But since it's only with the a/c on then I'm going to have to disagree. A/c is belt driven so it has nothing to do with the IAC.

v6kid · September 3rd, 2010, 09:52 PM

Originally Posted by mcqueen

But since it's only with the a/c on then I'm going to have to disagree. A/c is belt driven so it has nothing to do with the IAC.

The IAC has alot to do with the A/C during idle. When you turn on the a/c and the compressor kicks on, it adds extra load to the engine. In order to keep the RPM's up the engine needs a little more power, so it opens the IAC to let some extra air in.

mcqueen · September 3rd, 2010, 10:35 PM

Originally Posted by v6kid

The IAC has alot to do with the A/C during idle. When you turn on the a/c and the compressor kicks on, it adds extra load to the engine. In order to keep the RPM's up the engine needs a little more power, so it opens the IAC to let some extra air in.

Alright you got me there but I still highly doubt the IAC is the main source of the problem. If it was bad you'd have idle problems all the time.

v6kid · September 4th, 2010, 12:09 AM

(I'm not saying that the problem is the IAC but..) The IAC could be working just well enough to control idle at normal idle, but freak out under the pretty hefty load that the A/C causes.

0949er · September 4th, 2010, 12:07 PM

if there is a idle issue on a mustang... 9 times out of 10 it is the IAC... just throwing that out there.

and the reason I said that is because the first response to the guys question somebody said "AIC" which isnt a real part lol (that I know of at least lol)

September 2nd, 2010, 09:48 PM	#2
shelton gt 500 Regular 2002 mustang gt Join Date: Apr 2010 Location: Breckenridge TX Posts: 311 iTrader: 0 reviews	A.I.C motor. replace it or clean it. __________________

September 2nd, 2010, 10:08 PM	#4
ESG-642T [8MINUS2] 2002, Ford, v6 Join Date: Feb 2007 Location: TEXAS Posts: 12,207 iTrader: 0 reviews	It's prob a number of things honestly. __________________ Hi, You can call me Kyle

September 2nd, 2010, 10:31 PM	#5
Mr. Red Pony Gallagher's Worst Nightmare 2001 3.8 14.24 @ 96.02 Join Date: Jan 2010 Location: Lawton, Oklahomo Posts: 6,483 iTrader: 9 reviews	sounds like a common problem people get after the windstar. I have no way of proving this, but I see it as the computer bumping up the rpms to keep them from dropping with the pressure from the A/C being turned on. __________________ C/H/I 3.8 227rwhp 226rwtq @ 0psi, 0hp shot The Name is Danny. I'm a GM Technician. hi-comp 3.9 coming very soon.

September 2nd, 2010, 11:41 PM	#6
BlueScreaM MM Fanatic Better than ONLYaUNCfan's 2012@lightspeed Join Date: Aug 2010 Location: Columbia, SC Posts: 3,428 iTrader: 0 reviews	Its the A/C idle adjustment solenoid it is what raises the idle when the compressor is on. btw where did you get the black grill thinking about swapping them out __________________ Formerly, AhobosCheese and Cheddars.

September 3rd, 2010, 02:43 AM	#7
XXGREGXX Hardcore Enthusiast 2003 3.8L Mustang SIXXER Join Date: Aug 2010 Location: Arizona Posts: 2,269 iTrader: 1 reviews	the black grill looks like a mach 1 grill delete. Google it. __________________ Serbiandude Sig U.S Navy E-3 http://www.facebook.com/profile.php?id=100001133239318 http://www.moddedmustangs.com/forums...ore-style.html

September 3rd, 2010, 11:26 AM	#11
BlueScreaM MM Fanatic Better than ONLYaUNCfan's 2012@lightspeed Join Date: Aug 2010 Location: Columbia, SC Posts: 3,428 iTrader: 0 reviews	[QUOTE=ESG-642T;3128730]How about some sort of black mesh/chicken wire and the emblem [/QUOTE Thank you, at lease someone noticed that!! S __________________ Formerly, AhobosCheese and Cheddars. Last edited by BlueScreaM; September 3rd, 2010 at 11:29 AM.

September 3rd, 2010, 12:49 PM	#13
goren813 MM's Official Lucifer '00 3.8L Join Date: Apr 2008 Location: Odessa, FL Posts: 3,420 iTrader: 0 reviews	I don't think its the windstar, as plenty of Stangs have the issue stock. __________________ "Fast she goes...in the city of Overdose"

September 3rd, 2010, 08:54 PM	#15
0949er Hardcore Enthusiast 2004 Mustang GT 12.93 @ 111 Join Date: Apr 2010 Location: Charlotte Posts: 2,941 iTrader: 0 reviews	lol at all the random answers.... its called the I.A.C. stands for "Idle Air Control". __________________ MODS: Vortech V1 T-Trim @ 7.5 PSI (tuned down) Comp Cam Stage 2's + more 432 rwhp / 396 rwtq 02/27/2011 NEW VIDEOS! It takes ~$60 a rwhp (over stock) for a 99-04 Mustang GT. Do the Math C2H5OH on the horizon

September 4th, 2010, 12:09 AM	#19
v6kid Hardcore Enthusiast 1999 Mustang v6 Join Date: May 2010 Location: Clearwater, FL Posts: 1,731 iTrader: 0 reviews	(I'm not saying that the problem is the IAC but..) The IAC could be working just well enough to control idle at normal idle, but freak out under the pretty hefty load that the A/C causes. __________________ I went to school to be a mechanic, so I know what I'm talking about most of the time. mods in the garage, slowly getting peppier. 6ershootout.com summer of 2012... Be There

September 4th, 2010, 12:07 PM	#20
0949er Hardcore Enthusiast 2004 Mustang GT 12.93 @ 111 Join Date: Apr 2010 Location: Charlotte Posts: 2,941 iTrader: 0 reviews	if there is a idle issue on a mustang... 9 times out of 10 it is the IAC... just throwing that out there. and the reason I said that is because the first response to the guys question somebody said "AIC" which isnt a real part lol (that I know of at least lol) __________________ MODS: Vortech V1 T-Trim @ 7.5 PSI (tuned down) Comp Cam Stage 2's + more 432 rwhp / 396 rwtq 02/27/2011 NEW VIDEOS! It takes ~$60 a rwhp (over stock) for a 99-04 Mustang GT. Do the Math C2H5OH on the horizon

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