• Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

Car stalls. Confirming it sounds like IAC

  • Thread starter Thread starter AmBo
  • Start date Start date Apr 7, 2007

AmBo

Active Member
Feb 3, 2004
1,027
1
36
New Jersey
Apr 7, 2007
#1
  • Apr 7, 2007
  • #1
Okay guys, car lately will stall when coming to a stop. It'll happen once a ride normally. I'm suspecting it's the IAC because she cranks and turns right back over. It happens when I'm coming to a stop in neutral. Like the car doesn't know how to idle and it'll dip to <500 and then just die. Sounds like the IAC right? I just replaced this damn thing like 20,000 miles ago...I want to assume all the blowby gunked it up. I need to get that oil seperator in...
 

Mike97gt

it doe snot
Founding Member
Jan 26, 1999
10,633
7
89
the people's republic of massachusetts
Apr 7, 2007
#2
  • Apr 7, 2007
  • #2
yeah it's probably the iac
 

AmBo

Active Member
Feb 3, 2004
1,027
1
36
New Jersey
Apr 7, 2007
#3
  • Apr 7, 2007
  • #3
svttech76 said:
yeah it's probably the iac
Click to expand...

i took it off and sprayed it with some carb cleaner. didn't stall on my last outting. let's see if it holds up.
 

BennyBlown2v

New Member
Dec 9, 2004
1,233
1
0
Carmel, INdiana
Apr 7, 2007
#4
  • Apr 7, 2007
  • #4
Might be a tuning issue, might need the IAC table adjusted or something.
 

AmBo

Active Member
Feb 3, 2004
1,027
1
36
New Jersey
Apr 7, 2007
#5
  • Apr 7, 2007
  • #5
BennyBlown2v said:
Might be a tuning issue, might need the IAC table adjusted or something.
Click to expand...

That's what I'm hoping it's NOT.
 

BennyBlown2v

New Member
Dec 9, 2004
1,233
1
0
Carmel, INdiana
Apr 7, 2007
#6
  • Apr 7, 2007
  • #6
AmBo said:
That's what I'm hoping it's NOT.
Click to expand...

Why, Tim will send you a new tune for free!
 

AmBo

Active Member
Feb 3, 2004
1,027
1
36
New Jersey
Apr 7, 2007
#7
  • Apr 7, 2007
  • #7
BennyBlown2v said:
Why, Tim will send you a new tune for free!
Click to expand...

I know, but it's just more of a hassle. lol. So many little things to take care of!
 

hotmustang331

Active Member
Apr 29, 2004
2,967
3
48
Bastrop,TX
Apr 7, 2007
#8
  • Apr 7, 2007
  • #8
You guys have it easy lol. My car drives like crap .

New injectors, new MAF, new from scratch tune from Tim...still bucks and jerks and misses at different points between 800RPM and 1600RPM. I dont know what the heck is wrong with it...its now taking a few spins to fire up. This car is killing me with its drivability issues iv been having for the past 30,000 miles. But now the car is worse than ever with the turbos.
I muffle ALOT of it by how I drive. I let my dad drive it (been driving stock shifts all his life) and he stalled it quite a few times (stg 3 clutch) and it was bucking and jerking like crazy once he took off and was below 2K...felt like I was riding a darn roller coster. I was laughing pretty hard though at how bad my car really does drive . Im guessing its a coil pack tho...its like a cyclinder stops working and the pedal is sortof dead and it doesnt want to go at low part throttle and then it catches pushes the car forward and then it will drop power again (NOT surging idle..power then quick power loss and then regains)...repeat at certain low RPMs and that causes bucking. Even smooth light throttle from say 3rd gear from 1K RPMs...gets to about 1300 and the car shutters from power loss like a cylinder didnt fire. Off the gas down hill in gear with the engine @ 2200 RPM, you can feel it sortof shuttering, sortof like a cylinder dies every other hit or so.
Sorry.. End/rant

Anyways, hope your car stops stalling
 

AmBo

Active Member
Feb 3, 2004
1,027
1
36
New Jersey
Apr 8, 2007
#9
  • Apr 8, 2007
  • #9
hotmustang331 said:
You guys have it easy lol. My car drives like crap .

New injectors, new MAF, new from scratch tune from Tim...still bucks and jerks and misses at different points between 800RPM and 1600RPM. I dont know what the heck is wrong with it...its now taking a few spins to fire up. This car is killing me with its drivability issues iv been having for the past 30,000 miles. But now the car is worse than ever with the turbos.
I muffle ALOT of it by how I drive. I let my dad drive it (been driving stock shifts all his life) and he stalled it quite a few times (stg 3 clutch) and it was bucking and jerking like crazy once he took off and was below 2K...felt like I was riding a darn roller coster. I was laughing pretty hard though at how bad my car really does drive . Im guessing its a coil pack tho...its like a cyclinder stops working and the pedal is sortof dead and it doesnt want to go at low part throttle and then it catches pushes the car forward and then it will drop power again (NOT surging idle..power then quick power loss and then regains)...repeat at certain low RPMs and that causes bucking. Even smooth light throttle from say 3rd gear from 1K RPMs...gets to about 1300 and the car shutters from power loss like a cylinder didnt fire. Off the gas down hill in gear with the engine @ 2200 RPM, you can feel it sortof shuttering, sortof like a cylinder dies every other hit or so.
Sorry.. End/rant

Anyways, hope your car stops stalling
Click to expand...

hope it's not your DD cody!
 

hotmustang331

Active Member
Apr 29, 2004
2,967
3
48
Bastrop,TX
Apr 8, 2007
#10
  • Apr 8, 2007
  • #10
it is...100 miles per day
 

AmBo

Active Member
Feb 3, 2004
1,027
1
36
New Jersey
Apr 8, 2007
#11
  • Apr 8, 2007
  • #11
hotmustang331 said:
it is...100 miles per day
Click to expand...

oh no! mine is too and I drive 13 miles a day lol
 

hotmustang331

Active Member
Apr 29, 2004
2,967
3
48
Bastrop,TX
Apr 8, 2007
#12
  • Apr 8, 2007
  • #12
But I only work 3-4 days per week, so its not SOOO bad. Since most of its highway, I dont encounter the problems much....mainly just as im pulling into or out of my jobs facility. Because some of their road and parking lot/garage is low speed before you can get out of there.
 

mustangkid05

New Member
Mar 10, 2006
199
0
0
Apr 8, 2007
#13
  • Apr 8, 2007
  • #13
ambo my car was doing that yesterday, i know this probably wont concern you but idk, and i took out my air filter and it was a litttle wet. idk how, but i dried it off and put it back in and it was fine lol
 

AmBo

Active Member
Feb 3, 2004
1,027
1
36
New Jersey
Apr 8, 2007
#14
  • Apr 8, 2007
  • #14
man, getting to my air filter is a pita. lol. supercharger ftl! ... ok i'm over it, i love it again
 

sicK96GT

New Member
Oct 30, 2006
63
0
0
Austin (College in Waco)
Apr 8, 2007
#15
  • Apr 8, 2007
  • #15
alright this is not on my mustang but its basicly whats going on with my 99 Tahoe. Dont flame, I just have a small question! I dont even like the chevy! I swear!

Come to a stop (its auto) she dies, drops low rpm and just dies. I have to put it back in park and it cranks right back over and is fine till the next stop. I replaced filter, wires, plugs, cap and the blinker fluid. Could this also be a IAC problem?

Let me know
 

Dusstbuster

I love meat more than anything! I just have a spec
May 31, 2004
1,462
33
64
Moorhead, Minnesota
Apr 8, 2007
#16
  • Apr 8, 2007
  • #16
hotmustang331 said:
But I only work 3-4 days per week, so its not SOOO bad. Since most of its highway, I dont encounter the problems much....mainly just as im pulling into or out of my jobs facility. Because some of their road and parking lot/garage is low speed before you can get out of there.
Click to expand...

I don't want to be a Debbie Downer but I'm dreading the day we see your thread saying "MY ENGINE JUST BLEW UP"...get that stuff fixed ASAP!
 

hotmustang331

Active Member
Apr 29, 2004
2,967
3
48
Bastrop,TX
Apr 8, 2007
#17
  • Apr 8, 2007
  • #17
^well I turned the boost down to 8PSI (440RWHP)...so hopefully that thread will be put off a little longer .

Im going to buy 1 coil pack and test out each cyclinder...if the miss goes away when I find the bad cylinder, your going to see a thread filled with HAHAHA! If it doesnt fix it...ill compression check all the cyclinder. If everything turns out ok, ill regap the plugs to .040 or so....if I still have the miss im just going to give up and start crying .
 

Dusstbuster

I love meat more than anything! I just have a spec
May 31, 2004
1,462
33
64
Moorhead, Minnesota
Apr 9, 2007
#18
  • Apr 9, 2007
  • #18
hotmustang331 said:
^well I turned the boost down to 8PSI (440RWHP)...so hopefully that thread will be put off a little longer .

Im going to buy 1 coil pack and test out each cyclinder...if the miss goes away when I find the bad cylinder, your going to see a thread filled with HAHAHA! If it doesnt fix it...ill compression check all the cyclinder. If everything turns out ok, ill regap the plugs to .040 or so....if I still have the miss im just going to give up and start crying .
Click to expand...

What if it's 2 packs that are messed up? How much are they anyways?

If you ever reach the "give up and cry" point I know of a person that'll take the turbo's off your hand
 
You must log in or register to reply here.

Similar threads

F
2004 Mustang GT – Fuel Pump Not Priming
  • Fayio
  • Apr 22, 2026
  • SN95 4.6L Mustang Tech
Replies
7
Views
307
SN95 4.6L Mustang Tech Apr 27, 2026
n0v8or
N
A
Rough idle - cylinder 1 and 6 misfire HELP
  • austindavies935
  • Jul 24, 2025
  • SN95 4.6L Mustang Tech
Replies
12
Views
717
SN95 4.6L Mustang Tech Jul 24, 2025
gkomo
C
1967 Mustang 5.0 swapped shuddering/sputtering issues
  • Cro67
  • Sep 24, 2025
  • Fox Engine Swaparoo
Replies
3
Views
242
Fox Engine Swaparoo Sep 25, 2025
General karthief
E
2007 GT Stalls when lights or a/c turned on
  • ejscarfo
  • Jun 22, 2026
  • 2005 - 2009 Specific Tech
Replies
2
Views
137
2005 - 2009 Specific Tech Jun 29, 2026
ejscarfo
E
S
Engine Stalls when downshifting/coasting
  • Scott_S
  • Nov 5, 2025
  • Fox 5.0 Mustang Tech
Replies
11
Views
724
Fox 5.0 Mustang Tech Nov 6, 2025
Mustang5L5
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?