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

Car turning off

  • Thread starter Thread starter Javeed Mohammad
  • Start date Start date Feb 11, 2012
J

Javeed Mohammad

Member
Feb 9, 2012
47
2
9
San Antonio
Feb 11, 2012
#1
  • Feb 11, 2012
  • #1
Well today I installed new o2 sensors and I know the installation went perfect but for some reason now when I stop sometimes my car just turns off. What do you think it is the filters injectors etc need help on this one
 

wmburns

SN Certified Technician
Aug 14, 2009
5,892
514
204
Houston Texas
Feb 11, 2012
#2
  • Feb 11, 2012
  • #2
Did you disconnect the battery while doing the work? If so, it's normal for the car to run like crap after a battery disconnect. The PCM needs time to re-learn new idle trim values.

If you didn't disconnect the battery, then check for blown fuses. Especially F2.2 and F2.8 in the CJB. Today's cars have a ton of "always on" circuits and it easy to blow fuses if working on electrical hot.
 
J

Javeed Mohammad

Member
Feb 9, 2012
47
2
9
San Antonio
Feb 12, 2012
#3
  • Feb 12, 2012
  • #3
wmburns said:
Did you disconnect the battery while doing the work? If so, it's normal for the car to run like crap after a battery disconnect. The PCM needs time to re-learn new idle trim values.

If you didn't disconnect the battery, then check for blown fuses. Especially F2.2 and F2.8 in the CJB. Today's cars have a ton of "always on" circuits and it easy to blow fuses if working on electrical hot.
Click to expand...
i cleaned the idle control thing, the one next to the throttle body and i dprove it for like ten min and it ran really good. i cleaned it with some carb cleaner but i dont think this will work for long the idle when im coming to a stop is insanely low so im hoping i can find out what it is.
 

wmburns

SN Certified Technician
Aug 14, 2009
5,892
514
204
Houston Texas
Feb 13, 2012
#4
  • Feb 13, 2012
  • #4
Check for vacuum leaks. Perform the IAC basic functional test.

Note, it not recommended to clean the IAC with the black vent.

If you still think this is an injector problem, consider an injector cleaning/flow test service such as Injectorrx.com. Once cleaned they are as good as new. Cheaper than new.

Low idle can also be caused by poor cylinder to cylinder power balance (1 or more cylinders not pulling their weight).

Check out the following for help in trouble shooting idle and IAC problems.

http://www.allfordmustangs.com/foru...-dieing-idle-idling-rough-14.html#post2260649
 
You must log in or register to reply here.

Similar threads

Engine Keeping O2 sensors lit with long tube headers
  • keel
  • Jul 30, 2026
  • Fox 5.0 Mustang Tech
Replies
3
Views
140
Fox 5.0 Mustang Tech Jul 30, 2026
AeroCoupe
Engine Random Misfire at idle.
  • Gulftown980x
  • Jul 29, 2026
  • SN95 4.6L Mustang Tech
Replies
11
Views
291
SN95 4.6L Mustang Tech Jul 31, 2026
squeak93
M
Help! 2003 GT misfire when hot
  • Modular03
  • Feb 10, 2026
  • SN95 4.6L Mustang Tech
Replies
4
Views
434
SN95 4.6L Mustang Tech Feb 13, 2026
Mustang5L5
E
2007 GT Stalls when lights or a/c turned on
  • ejscarfo
  • Jun 22, 2026
  • 2005 - 2009 Specific Tech
Replies
2
Views
155
2005 - 2009 Specific Tech Jun 29, 2026
ejscarfo
E
Engine Vacc leak detector
  • Creomod
  • Jul 19, 2026
  • Fox 5.0 Mustang Tech
Replies
4
Views
133
Fox 5.0 Mustang Tech Jul 25, 2026
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?