2003 4.6 idle hangs up

 
  #1  
Old 07-11-2019, 08:20 PM
Junior Member
Thread Starter
Join Date: Jul 2019
Posts: 6
Likes: 0
Received 0 Likes on 0 Posts
2003 4.6 idle hangs up

2003 2wd f150 4.6 Triton
Idles high at first start up around 1500 to 2000 rpm for a couple minutes then smooths out, but while driving the rpm will hang up where it was for a couple seconds like cruise control is on, and if I slow down the idle fights me. I assumed it was the temo sensor but replaced with no change. Not throwing any codes after I changed the temp sensor.
My next step is to look for a vacume leak but with how its acting i dont think that's it, it is not constant at all it picks anc chooses when yo stay high in the rpm while driving, and it died in me once when I stopped fast and the idle stayed at about 1300 then died.
Any help would be greatly appreciated thank you.
 
  #2  
Old 07-12-2019, 12:08 AM
glc's Avatar
glc
glc is online now
Senior Member
Join Date: Dec 2006
Location: Joplin MO
Posts: 38,631
Received 7 Likes on 7 Posts
2 possibilities:

1. Sticky IAC.

2. Sticky throttle linkage.

I had the same thing happen to my V6 - the doghouse on top of the engine was loose and the throttle linkage was hanging up on it.
 
  #3  
Old 07-13-2019, 11:08 AM
Junior Member
Thread Starter
Join Date: Jul 2019
Posts: 6
Likes: 0
Received 0 Likes on 0 Posts
Iac is new, and linkage is not sticking.
If I can keep it under 2000 rpm the rpm doesn't hang up
 
  #4  
Old 07-13-2019, 07:19 PM
Technical Article Contributor
Join Date: Jan 2007
Location: Vernon, NY
Posts: 9,008
Received 12 Likes on 12 Posts
I would check to see if you have any pending codes. Confirmed codes will get CEL. So you might have codes, but the truck isn't sure yet to make them confirmed to illuminate the SES/CEL (service engine soon/check engine light).
 
 


Thread Tools
Search this Thread
Quick Reply: 2003 4.6 idle hangs up


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.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: