2004 Idling issues - MustangForums.com

4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

2004 Idling issues

Old 09-11-2014, 11:24 AM
Thread Starter
Thedunzelmon's Avatar
Join Date: Sep 2014
Location: New Jersey
Posts: 10
Arrow 2004 Idling issues

Okay ill keep things short because i have been having issues posting to this forum cause im new here. But my 2004 GT is idling funky when warming up. It surges between 700 and 900 rpm. When driving everything is fine no spitting or missing. No engine codes. Just this unusual idle. The car has an aftermarket intake and throttle body which i have checked and everything is on nice and tight. Thottle position sensor is new. I ordered a new IAC valve and am having trouble to find a new PCV valve for my motor. My car has 82000 miles and never did this until recently and i want to fix it before it gets worse. Is there something i didnt check? Something else it could be? Please help
Attached Thumbnails 2004 Idling issues-10792_834505769896698_455096011_n.jpg  
Thedunzelmon is offline  
Old 10-04-2014, 11:01 PM
Join Date: Sep 2013
Location: Georgia
Posts: 19

Not saying this is your issue but I would start with checking the codes and seeing if its having a spark issue, if you can get a good scanner or borrow one, you could see if it misfires in any cylinder or use an oscilloscope to check the coil on plugs. Could just be a misfire, I had the same problem. After doing a spark plug and coil on plug swap, the problem went away. Like I said, my problem could be different from yours.
Brad01GT is offline  
Related Topics
Thread Starter
Last Post
2005-2014 Mustangs
01-28-2016 06:09 PM
Classic Mustangs (Tech)
09-16-2015 12:20 PM
SVT Forums
09-13-2015 10:23 PM
4.6L General Discussion
09-04-2015 03:04 PM
General Tech
09-03-2015 10:45 PM

Thread Tools
Search this Thread
Quick Reply: 2004 Idling issues

Featured Sponsors
Vendor Directory

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.