bad iac?
Thread Starter
|
Fleet Mechanic
Joined: Dec 2004
Posts: 1,365
Likes: 6
From: Ketchikan, AK.
bad iac?
well, i have a 99 f250 sd 5.4L, and it had a rough idle at times, so i changed the spark plugs out to bosch platinum plugs. well, i never checked the gapping, and i heard a lot of bad about the bosch plugs in a mod engine. so, today i changed back to a set of new motorcraft plugs. then i cleaned the iac, and the throttle body. well, it seems to idle a bit smoother, but sometimes when i start it, it seems to act real wierd. it will idle from 300-800 rpm's, and wants to die. if i hit the gas, it will respond and then assume a normal idle. could this just be a bad iac, or something else before i spend the money on the iac. thanks !!!!
Senior User
Joined: Mar 2004
Posts: 224
Likes: 1
From: Central Ohio
Yes, it could be the IAC. But no guarantees. An idle learn might help. Try disconnecting the battery, hit the brake lights for a minute, just to gently pull any juice from the computer. Then it will relearn over the next day or two.
Thread
Thread Starter
Forum
Replies
Last Post
Tony Bagnall
1987 - 1996 F150 & Larger F-Series Trucks
4
Mar 18, 2013 08:05 PM
Omeagher460
1987 - 1996 F150 & Larger F-Series Trucks
7
May 3, 2008 11:08 PM
areyou4real
2.6, 2.8, 2.9, 4.0 & SOHC 4.0 V6
3
Apr 29, 2004 06:49 AM
