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

Idle problem with a/c on

  • Thread starter Thread starter FiveOfastback
  • Start date Start date Jul 25, 2005
F

FiveOfastback

New Member
Dec 25, 2004
32
0
0
Bethlehem, pa
Jul 25, 2005
#1
  • Jul 25, 2005
  • #1
Besides my 67 I have an 88 GT 5 speed all stock. I have an idle problem with A/c on after throttle is blipped wants to stall or will stall. Adjusted idle up slightly TPS is set to .97 volts Cleaned Iac new air filter. Did some checks for vacuum leaks not very thoroughly though. The car has sat till recently for 3 years. I replaced the fuel pump filter, fuel regualtor and #1 injector(do to crack in tip).
I need some advice from the FI experts as I am a newbie to injection. BTW this a speed density car.
HELP!
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
34
129
Jul 25, 2005
#2
  • Jul 25, 2005
  • #2
Did you set the idle with the IAC disconnected? That helps some folks.

a SD motor should pull nearly 20" hg of vac at idle. The vac signal is critical to proper operation, so it is worth testing IMHO.

A Mitivac is useful for testing vac lines.

No codes (SD cars have no functional CEL).
Good luck.
 
You must log in or register to reply here.

Similar threads

7
Engine Random hanging idle
  • 706 Saleen
  • Feb 11, 2026
  • Fox 5.0 Mustang Tech
Replies
9
Views
836
Fox 5.0 Mustang Tech Feb 19, 2026
86HO5.0
8
B
Help! Fox with idle issues
  • bbarton
  • Sep 11, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
7
Views
296
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Sep 12, 2026
AeroCoupe
M
3.8 start problems. New edge 2003
  • Mayk.i.
  • Oct 2, 2025
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
2
Views
265
1996 - 2004 SN95 Mustang -General/Talk- Oct 3, 2025
manicmechanic007
SURGING IDLE / NO IDLE CHECKLIST FOR 1999–2004 MUSTANG GT (4.6L 2V) - Work In Progress
  • Noobz347
  • Aug 30, 2025
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
0
Views
1K
1996 - 2004 SN95 Mustang -General/Talk- Aug 30, 2025
Noobz347
SURGING IDLE / NO IDLE CHECKLIST FOR 1996–1998 MUSTANG GT (4.6L 2V) - Work In Progress
  • Noobz347
  • Aug 30, 2025
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
0
Views
1K
1996 - 2004 SN95 Mustang -General/Talk- Aug 30, 2025
Noobz347
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?