IAC? god this is frustrating

95GTV8

New Member

Jul 25, 2005

386

3

0

Washington State

Sep 4, 2006

#1

• Sep 4, 2006

• #1

I just had my starter motor replaced. Car starts fine/drives fine. Now when I put the car in neutral about 65% of the time it dies. I thought it was the IAC so i cleaned it out with carb cleaner and that seemed to work for a day. I turned the car on after doing that let it idle for like 2 minutes and it idled and drove him beatifully. That was yesterday, today i go for a drive uptown and it dies prolly 65% of the time it's in neutral. Is this the IAC?

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

34

129

Sep 4, 2006

#2

• Sep 4, 2006

• #2

Did you set your no load hot idle where it requires IAC input (a duty cycle %)? If so, and the IAC simply crapped out, that could be an issue. I've had good luck setting my '94's hot, no-load idle with no IAC duty cycle.

Pulling the codes would be step one.

Good luck.

 

95GTV8

New Member

Jul 25, 2005

386

3

0

Washington State

Sep 4, 2006

#3

• Sep 4, 2006

• #3

could you explain the duty cycle? I've set the idle on the TB before with the screw, but nothing more.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

34

129

Sep 4, 2006

#4

• Sep 4, 2006

• #4

Simply stated, you'd get the engine hot. Then disconnect the IAC and set the idle where you want it. Then reconnect the IAC and see how it does.

Having the IAC disconnected during the setting of the idle-stop screw (I dont hose with the bleed screw) mimics zero IAC duty cycle.

Good luck.

 

jrichker

StangNet's favorite TOOL

In Remembrance. Thank you for your contributions

Mar 10, 2000

27,512

2,813

234

Dublin GA

Sep 4, 2006

#5

• Sep 4, 2006

• #5

See "Help me create the Surging Idle Checklist" at http://forums.stangnet.com/showthread.php?t=534062
for help with your idle problems. The first post contains all the updates to the fixes. I continue to update it as more people post fixes or ask questions.

 

95GTV8

New Member

Jul 25, 2005

386

3

0

Washington State

Sep 4, 2006

#6

• Sep 4, 2006

• #6

Allright thank you. Is it possible for the car to drive w/o the IAC? I'll try this tomorrow.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

34

129

Sep 4, 2006

#7

• Sep 4, 2006

• #7

95GTV8 said:

Allright thank you. Is it possible for the car to drive w/o the IAC? I'll try this tomorrow.

Click to expand...

When I have a hot, no load idle situation I can. The car would not start (the IAC is part of the cold idle enrichment process), allow me to run AC (IAC increases the idle a couple hundred RPM for that), etc.

I've known of a couple guys in warm climates who adjusted their idle up and then ran with no IAC or a block off plate for the summer.

In case it helps is this article. Good luck.

 

Shakerhood

20+ Year Stangneter

Oct 28, 2004

3,356

208

114

Ohio

Sep 4, 2006

#8

• Sep 4, 2006

• #8

Are you able to unplug and remove the IAC to clean it without having to reset anything?

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

34

129

Sep 5, 2006

#9

• Sep 5, 2006

• #9

Shaker, technically yes. I'm not real big on the mandatory "You need to clear the KAM" statements that are common. I often dont disco' the battery.

So long as the stored values werent so far out of whack that the car will run ok after the cleaning (it hadn't need to radically adapt), I just let it relearn on its own from the old setting. It doesnt hurt to reset the KAM though.

Good luck.