Notices
1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Iac stuck open.

Thread Tools
 
Search this Thread
 
Old Mar 26, 2014 | 08:50 AM
  #1  
brandonnichols's Avatar
brandonnichols
Thread Starter
|
Freshman User
Joined: Dec 2013
Posts: 33
Likes: 0
Iac stuck open.

Have an 87 f150 302 and the iac is stuck open I replaced it. But it's still an extremely high idle. I have no vacuum leaks, used a smoke machine to check. And I also replaced coolant temp sensor. Any other ideas?
 
Reply
Old Mar 26, 2014 | 09:02 AM
  #2  
whiteboyslo's Avatar
whiteboyslo
Posting Guru
20 Year Member
Joined: Jan 2001
Posts: 1,101
Likes: 2
From: Poway, CA
Did you replace it with an OEM part? I only ask because I once had the same issue on a 89 T-bird. I replaced the IAC valve with one I bought at the local parts store, but it didn't change anything. I spent forever trying to figure out what it might be, but I eventually gave up and took it to the stealership. They replaced my new IAC valve with a Motorcraft part, and all was well.

Mike
 
Reply
Old Mar 26, 2014 | 09:21 AM
  #3  
Conanski's Avatar
Conanski
FTE Legend
15 Year Member
Photogenic
Photoriffic
Community Builder
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Here's a test for you.. unplug the TPS. If idle speed drops then your TPS is bad, if it doesn't then the IAC or computer is suspect.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
rj1983
1987 - 1996 F150 & Larger F-Series Trucks
2
Feb 4, 2017 04:26 PM
Bobby82490
1997 - 2003 F150
7
Dec 4, 2009 02:15 PM
quisp-n-quake
1987 - 1996 F150 & Larger F-Series Trucks
4
Sep 25, 2007 09:07 AM
willys59cj5
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
9
Jan 18, 2007 08:18 PM
JEV
1987 - 1996 F150 & Larger F-Series Trucks
17
Jun 9, 2005 08:28 PM




All times are GMT -5. The time now is 02:45 AM.

story-0
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level

Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.

By Verdad Gallardo | 2026-06-12 11:01:55


VIEW MORE
story-1
Top 10 Fords at 2026 Carlisle Ford Nationals

Slideshow: Top 10 Fords at 2026 Ford Nationals

By Joe Kucinski | 2026-06-09 11:10:08


VIEW MORE
story-2
3 Best / 3 Worst Parts of Modern Ford Ownership

Based on years of owning multiple modern Ford products.

By Brett Foote | 2026-06-09 10:53:36


VIEW MORE
story-3
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

SPONSORED: From muddy boots to rain-soaked cargo, these upgrades address some of the most common frustrations Ford truck owners face every day.

By Pouria Savadkouei | 2026-06-08 18:50:34


VIEW MORE
story-4
Every 2026 Ford Engine Explained

Here's everything you need to know about every Ford engine available for the 2026 model year.

By Brett Foote | 2026-06-05 12:58:01


VIEW MORE
story-5
10 Ugly Ford Trucks That We Still Kinda Love

Slideshow: 10 ugly Ford trucks that we still kinda love.

By Joe Kucinski | 2026-06-03 09:51:16


VIEW MORE
story-6
10 Things Every Truck Owner NEEDS (2026 Edition)

Slideshow: the best gifts for dads & grads

By Michael S. Palmer | 2026-06-03 15:43:58


VIEW MORE
story-7
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.

By Verdad Gallardo | 2026-06-03 11:38:36


VIEW MORE
story-8
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Slideshow: 10 most expensive Ford trucks ever sold on Bring a Trailer.

By Joe Kucinski | 2026-05-27 16:24:34


VIEW MORE
story-9
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Here's everything that has changed for the latest model year.

By Brett Foote | 2026-05-27 16:17:28


VIEW MORE