Idle
Lead Driver
Joined: Sep 2006
Posts: 7,907
Likes: 143
Honestly you don't have an idea what else to do?
How about the check engine light?
Is there any code set?
A Scanner looking at live data might show one or both fuel tables out of limits.
Then you act on that data for repairs.
As of the moment, you have nothing to report but rough idle.
Need to see why, then do the repairs.
Good luck.
How about the check engine light?
Is there any code set?
A Scanner looking at live data might show one or both fuel tables out of limits.
Then you act on that data for repairs.
As of the moment, you have nothing to report but rough idle.
Need to see why, then do the repairs.
Good luck.
New User
Joined: Oct 2014
Posts: 11
Likes: 0
does it feel like its got a rough or low idle or does it feel like its just dying on the start
Trending Topics
Fleet Mechanic
Joined: Aug 2008
Posts: 1,446
Likes: 9
From: NE Iowa JD Country
Idle Air Control.
it located on the rear of the upper intake, back by the firewall.
on the 4.6 and 5.4...can't speak for the 4.2 v6. Which engine and year is yours?
they can get sticky/dirty and cause a fluctuating idle...rollercoastering from 700- to maybe as high as 1800-2000ish. They can be removed and cleaned but some times cleaning may take one then one time or they just won't respond and a new one is in order. FYI cheep aftermarket one will not perform well , better off getting a motorcraft.
I found it best to remove the whole throttle body housing, reasons being, #1 that the IAC will come off with it and then it easier to remove and replace. #2 there is a couple of EGR port internal to the throttle body housing that also can get plugged and cause some erratic running issues and one can clean those out too. Not hard, figure on a 2-3 hrs
it located on the rear of the upper intake, back by the firewall.
on the 4.6 and 5.4...can't speak for the 4.2 v6. Which engine and year is yours?
they can get sticky/dirty and cause a fluctuating idle...rollercoastering from 700- to maybe as high as 1800-2000ish. They can be removed and cleaned but some times cleaning may take one then one time or they just won't respond and a new one is in order. FYI cheep aftermarket one will not perform well , better off getting a motorcraft.
I found it best to remove the whole throttle body housing, reasons being, #1 that the IAC will come off with it and then it easier to remove and replace. #2 there is a couple of EGR port internal to the throttle body housing that also can get plugged and cause some erratic running issues and one can clean those out too. Not hard, figure on a 2-3 hrs
Last edited by enriched&beyound; Apr 5, 2016 at 11:16 AM. Reason: more
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Thread
Thread Starter
Forum
Replies
Last Post