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

IAC problems

  • Thread starter Thread starter Zephyris
  • Start date Start date Oct 7, 2009
Z

Zephyris

New Member
Oct 7, 2009
1
0
0
Oct 7, 2009
#1
  • Oct 7, 2009
  • #1
Hello,

I've got a 93 cobra and just did heads/cam on it, and got a base tune locally. Right now all I can do is have the idle screw set high, cause my IAC is pretty much inop... here are the symptoms:

- TPS is GOOD, IAC itself is GOOD, along with old GOOD IAC.
- Voltage coming from IAC harness is 13.7 constant, does not change regardless of engine conditions.
- Hard idle is set to ~1200 until I can get this fixed...

Any suggestions? Tried resetting everything, no go, along with all the complete checks I've found via search on this and other forums.

If it's something stupid I'd love for that to be the case... any suggestions?
 

liljoe07

5 Year Member
Feb 18, 2009
1,622
363
124
Cartersville,Ga
Oct 7, 2009
#2
  • Oct 7, 2009
  • #2
Have you verified the ground on the IAC is good?
 
You must log in or register to reply here.

Similar threads

C
Engine Idle cuts out
  • claypoolxx
  • Mar 7, 2026
  • Fox 5.0 Mustang Tech
  • 2
Replies
20
Views
459
Fox 5.0 Mustang Tech Saturday at 5:11 PM
alutwon
E
Engine EEC-IV Problems
  • EDDIEM75
  • Jun 13, 2025
  • Fox 5.0 Mustang Tech
  • 2 3 4
Replies
62
Views
2K
Fox 5.0 Mustang Tech Jun 29, 2025
manicmechanic007
C
1967 Mustang 5.0 swapped shuddering/sputtering issues
  • Cro67
  • Sep 24, 2025
  • Fox Engine Swaparoo
Replies
3
Views
186
Fox Engine Swaparoo Sep 25, 2025
General karthief
8
Engine Rough idle and aggressive sputtering when accelerating
  • 88vertible
  • Aug 13, 2025
  • Fox 5.0 Mustang Tech
Replies
4
Views
998
Fox 5.0 Mustang Tech Dec 13, 2025
Jarhead67
J
S
Electrical Stumped No Start...
  • sydhawk
  • Oct 28, 2025
  • Fox 5.0 Mustang Tech
Replies
8
Views
257
Fox 5.0 Mustang Tech Oct 29, 2025
sydhawk
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?