back to the drawing board!

[shawnfi]

Hey guys I am brand new to this forum and brand new to Mustangs! I have a 2003 GT with the 4.6! it was idling horribly and wouldn't stay running. Self diagnosed the Idle AC valve replaced it and it ran like a charm for several days. Then it sat for about a week and started with the exact same symptoms. Do I possibly need to reset the computer? Help

 

[wmburns]

Here's some information that may be of help.

Trouble shooting IAC idle problems 1996-2004
http://www.allfordmustangs.com/forums/2260649-post200.html

Don't ignore:

• the charging system
• the ignition system
• intake vacuum leaks
• exhaust leaks.
• fuel pressure