Ford Idle Air Control
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
Ford Idle Air Control
I am new to this whole concept of DIY EFI and so far i have figured it all out but, where does the ford idle air controler wire up to the relay board? I have the V3 MS-II and am very confused. does it go to the IAC Stepper leads or do i have to wire it to the conputer itself?
Anyone can just turn the key and go, but it takes determination to understand why it goes!
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Matt Cramer
- Super Squirter
- Posts: 2951
- Joined: Sat Jul 03, 2004 11:35 am
Re: Ford Idle Air Control
You'll need the PWM IAC mods to the main board and this jumper on the relay board:
The output comes out on the FIDLE pin. Fords do not use a stepper IAC.
The output comes out on the FIDLE pin. Fords do not use a stepper IAC.
Re: Ford Idle Air Control
Could you please clarify specifically on the wiring of a 2-wire Ford PWM Idle Control Valve?
The way I understand this now, one lead goes from the FIDLE pin on the relay board, and the other lead must then have to go to +12V, right? And then a 1N4001 Diode is installed between those leads, with the band facing the 12V+?
Is that correct?
Also, what is the resistor I see on the FIDLE terminal in the above picture? (I'm hoping it's for a different kind of valve!)
Thanks!!
Peter
The way I understand this now, one lead goes from the FIDLE pin on the relay board, and the other lead must then have to go to +12V, right? And then a 1N4001 Diode is installed between those leads, with the band facing the 12V+?
Is that correct?
Also, what is the resistor I see on the FIDLE terminal in the above picture? (I'm hoping it's for a different kind of valve!)
Thanks!!
Peter
1985 XR4ti
http://www.85xr.com
http://www.85xr.com
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Matt Cramer
- Super Squirter
- Posts: 2951
- Joined: Sat Jul 03, 2004 11:35 am
Re: Ford Idle Air Control
You're correct about the wiring.
That resistor is for an older mod that used FIDLE for spark control and is not used with actual fast idle valves. We "recycled" the jumper picture as the jumper itself doesn't change.
That resistor is for an older mod that used FIDLE for spark control and is not used with actual fast idle valves. We "recycled" the jumper picture as the jumper itself doesn't change.
Re: Ford Idle Air Control
Thanks Matt!
(FYI, I purchased all my MS stuff from you!)
Peter
(FYI, I purchased all my MS stuff from you!)
Peter
1985 XR4ti
http://www.85xr.com
http://www.85xr.com