Need Help 03 Gt

Debonaire · Jul 22, 2016

hey guys, I have a 2003 mustang GT, and the reason why I'm here today is to see if anyone can help me figure out what's wrong with my car or point me to the right direction. The problem with my car started a few weeks ago, when I'm out for a drive and I make a complete stop, the car idles close to 1k rpm and then shuts off. It starts right back up again with no problem. I changed the fuel filter,air control valve,idle pulley,tension pulley,spark plugs,and serpertine belt in hopes that it would solve the issue, but it didn't.

wmburns · Jul 23, 2016

The next step should be a through review of the battery and charging system. You may not believe this but the motor shutting down for no reason with an easy restart could be a bad battery or loose battery cable.

Bottom line. Today's cars simply will not run right without a strong battery and charging system.

Debonaire · Jul 23, 2016

wmburns said:
The next step should be a through review of the battery and charging system. You may not believe this but the motor shutting down for no reason with an easy restart could be a bad battery or loose battery cable.

Bottom line. Today's cars simply will not run right without a strong battery and charging system.

Hey thanks, I went ahead and checked the battery and cables to the best of my ability, and everything looks fine. The battery is maybe 8months old. Should I replace the battery before you recommend something else?

jeno_labanca · Jul 23, 2016

Have the battery and alternator tested before buying

Sent from my SM-N910T using Tapatalk

Debonaire · Jul 23, 2016

jeno_labanca said:
Have the battery and alternator tested before buying

Sent from my SM-N910T using Tapatalk

Just got the battery and alternator tested, both are good

wmburns · Jul 23, 2016

Automatic or manual? If automatic does the problem only occur coming to a stop?

Are you positive there isn't a vacuum leak?

Here's some information on how to trouble shoot idle/IAC issues:
http://www.stangnet.com/mustang-forums/resources/troubleshoot-iac-idle-problems-1996-2004.13/

Debonaire · Jul 24, 2016

wmburns said:
Automatic or manual? If automatic does the problem only occur coming to a stop?

Are you positive there isn't a vacuum leak?

Here's some information on how to trouble shoot idle/IAC issues:
http://www.stangnet.com/mustang-forums/resources/troubleshoot-iac-idle-problems-1996-2004.13/

The car is manual, and yes only when I make a complete stop does the car shut off. Not every single time but maybe 6/10 times will the car shut off. I will check for a vacuum leak today and let you know what I found. And thanks for the link, I will clean my mass air flow sensor just to be sure

Debonaire · Jul 24, 2016

wmburns said:
Automatic or manual? If automatic does the problem only occur coming to a stop?

Are you positive there isn't a vacuum leak?

Here's some information on how to trouble shoot idle/IAC issues:
http://www.stangnet.com/mustang-forums/resources/troubleshoot-iac-idle-problems-1996-2004.13/

Checked for vacuum leaks and didn't find any. Also cleaned mass air flow sensor and didn't seem to solve the issue

wmburns · Jul 24, 2016

sooooo what about the results of all the other tests called out in the resource guide?

Modular2v · Jul 27, 2016

Check your 02s

Need Help 03 Gt

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