Testing Idle Air Control Valve
Thread Starter
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Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
Testing Idle Air Control Valve
I havn't yet, its on the to do list.
Primary rig is Green Thunder:
95' F-150 XLT 4x4, 302, 5 spd, MSD 6A, Flowmaster Exhaust, Sunroof, Clear corners w/ Diamond headlights, CD player with 2 10" subs and some 32" BFG Muds
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Check out my Gallery for a look-see.
Justin - One Happy FTE Member
Primary rig is Green Thunder:
95' F-150 XLT 4x4, 302, 5 spd, MSD 6A, Flowmaster Exhaust, Sunroof, Clear corners w/ Diamond headlights, CD player with 2 10" subs and some 32" BFG Muds
.Check out my Gallery for a look-see.
Justin - One Happy FTE Member
Posting Guru
Joined: Jan 2001
Posts: 2,358
Likes: 3
From: Nebraska
Testing Idle Air Control Valve
Have you guys checked your codes to be sure something else isn't causing the problem?
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1995 F-150 Supercab XLT 155" 4x4 M5OD 302
1986 F-150 4x4 NP435 300
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1995 F-150 Supercab XLT 155" 4x4 M5OD 302
1986 F-150 4x4 NP435 300
Elder User
Joined: May 2001
Posts: 692
Likes: 1
From: Coon Rapids, MN
Testing Idle Air Control Valve
What do you mean it is a non cleanable IAC? What I have done in the past is just squirt some PB blaster (or any other solvent clearner/carb clearner) in the 2 wholes and let it set for 5 minutes and drain it out and wipe the residue out. This does get rid of the so called "protective anti-carbon coating" on the inside of the IAC (which maybe is what your talking about) but I havn't found that to be a big deal. If its dirty already from 8+ years of use, how you gonna make it dirtier by cleaning it? Hope you fix it. I have that same problem every once in a while on my truck. But It doesn't happen enough for me to care about fixing it.
OH!!! I like your analogy of COLD. lol Im used to temperatures around 0 during the daytime around here at this time year.
OH!!! I like your analogy of COLD. lol Im used to temperatures around 0 during the daytime around here at this time year.
Senior User
Joined: Sep 2002
Posts: 159
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From: abbotsford canada
Testing Idle Air Control Valve
checked my codes running and not running
no codes just the self test pass
gonna try cleaning the egr tonight and mayeb make up a restrictor plate ive heared good things about these so its worth a try
no codes just the self test pass
gonna try cleaning the egr tonight and mayeb make up a restrictor plate ive heared good things about these so its worth a try
Thread Starter
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Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
Testing Idle Air Control Valve
There are two types of IACs used. My 95 Dealership Service Manual shows a cleanable and non-cleanable one. The non-cleanable ones you can spray carb cleaner in the air flow inlet/outlet but a complete cleaning is not possible. The cleanable one is only used on the 5.8L lightning and the 7.0L.
Primary rig is Green Thunder:
95' F-150 XLT 4x4, 302, 5 spd, MSD 6A, Flowmaster Exhaust, Sunroof, Clear corners w/ Diamond headlights, CD player with 2 10" subs and some 32" BFG Muds .
Check out my Gallery for a look-see.
Justin - One Happy FTE Member
Primary rig is Green Thunder:
95' F-150 XLT 4x4, 302, 5 spd, MSD 6A, Flowmaster Exhaust, Sunroof, Clear corners w/ Diamond headlights, CD player with 2 10" subs and some 32" BFG Muds
.Check out my Gallery for a look-see.
Justin - One Happy FTE Member
Senior User
Joined: Sep 2002
Posts: 159
Likes: 0
From: abbotsford canada
Testing Idle Air Control Valve
mustang i have solved my high idle problems
picked up a map sensor at the wreckers just to try it and sure enough after a few days of driving my problems gone
picked up a map sensor at the wreckers just to try it and sure enough after a few days of driving my problems gone
Thread Starter
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Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
Testing Idle Air Control Valve
Congrats. Hope thats my problem, thanks for the imput.
Primary rig is Green Thunder:
95' F-150 XLT 4x4, 302, 5 spd, MSD 6A, Flowmaster Exhaust, Sunroof, Clear corners w/ Diamond headlights, CD player with 2 10" subs and some 32" BFG Muds .
Check out my Gallery for a look-see.
Justin - One Happy FTE Member
Primary rig is Green Thunder:
95' F-150 XLT 4x4, 302, 5 spd, MSD 6A, Flowmaster Exhaust, Sunroof, Clear corners w/ Diamond headlights, CD player with 2 10" subs and some 32" BFG Muds
.Check out my Gallery for a look-see.
Justin - One Happy FTE Member
Freshman User
Joined: Jun 2002
Posts: 41
Likes: 0
Testing Idle Air Control Valve
I just unpluged mine and it runs great now. The rpms don't stay up like it use to when its cold, you've got to keep it reved up until it is warm.
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Joined: May 2002
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From: Ash Grove USA
Testing Idle Air Control Valve
I had a idle prob for a while too in my 93 5.8L. First thing I tried was the IAC, but that didn't solve it. Ended up being my TPS. It was way out of tolerence but didn't give me a "check engine" light. The TPS fixed the idle and greatly improved throttle response.
New User
Joined: Nov 2005
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"Sticky Throttle"
Hey I have a 01 Mustang that has the same "sticky throttle problem" It's been haunting me for a while and I can't figure it out. Please help!!!
Whenever you go to shift the rpms stay put for a few seconds.
Whenever you go to shift the rpms stay put for a few seconds.
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We are happy you have chosen the best source for Fords!
Enjoy FTE....and
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New User
Joined: Nov 2005
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The rpms still stay high but I disconnected the IAC valve and the rpms drop fast when I shift. So I don't know if its the IAC valve or my computer. Should I replace the 80 $ IAC Valve or pay 80 $'s to have my car checked out and then the price of the parts?
Senior User
Joined: Jul 2004
Posts: 104
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From: Vincennes, IN
I too now have the high idle demon. Unplugged the IAC and the idle dropped. Sprayed some Throttle Body cleaner around vacuum lines and plenum gaskets and such, and had no change in idle. But is the moral of the story that a high idle could be an IAC, or a mysterious seal leak, or a TPS, or an EGR, or an EVP? Is this the path I have to take?