• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

Tried to set idle but car won't run without the IAB.

  • Thread starter Thread starter Brian992V
  • Start date Start date Jun 6, 2009

Brian992V

Founding Member
Feb 11, 2000
880
0
0
Lexington,KY
Jun 6, 2009
#1
  • Jun 6, 2009
  • #1
Im having cold idle issues and I can't set the idle because it dies without the IAB plugged in. Im thinking its vacuum related so I may just pull the intake and valve covers and adjust the rockers.
 

nero6

Member
Aug 30, 2007
94
0
6
Jun 6, 2009
#2
  • Jun 6, 2009
  • #2
I had to adjust the the stop screw on the throttle body to adjust the idle up a bit before it would idle without the IAC connected. Then I was able to set the idle properly, although I have a performance cam (do ask me what type as the prior owner had it installed) in mine so I needed to set the idle a bit higher 900-950 to idle properly).
 

jrichker

StangNet's favorite TOOL
In Remembrance. Thank you for your contributions
Mar 10, 2000
27,512
2,813
234
80
Dublin GA
lowendmac.com
Jun 6, 2009
#3
  • Jun 6, 2009
  • #3
See the "Surging Idle Checklist for help with all your idle/stall problems. Everything you need to find and fix idle problems is in there.

The first two posts contain all the updates to the fixes. At last count there were 24 possible causes and fixes for surging idle/stall problems. I continue to update it as more people post fixes or ask questions.
 
You must log in or register to reply here.

Similar threads

S
Holley High-ram tuning settings
  • spencergt66
  • Apr 1, 2026
  • Digital Self-tuning Forum
  • 2
Replies
28
Views
690
Digital Self-tuning Forum Jun 19, 2026
spencergt66
S
S
Engine Stalls when downshifting/coasting
  • Scott_S
  • Nov 5, 2025
  • Fox 5.0 Mustang Tech
Replies
11
Views
748
Fox 5.0 Mustang Tech Nov 6, 2025
Mustang5L5
2
Running very very rich
  • 2esoteric
  • Oct 31, 2025
  • Fox 5.0 Mustang Tech
Replies
4
Views
358
Fox 5.0 Mustang Tech Oct 31, 2025
Noobz347
Engine Surging idle on start-up
  • keel
  • Aug 11, 2025
  • Fox 5.0 Mustang Tech
Replies
16
Views
956
Fox 5.0 Mustang Tech Oct 31, 2025
keel
S
Fox '87 GT can't get to stay running
  • spilly
  • Mar 29, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
27
Views
845
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jun 20, 2026
spilly
S
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 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?