Anyone using ford two-wire idle valve (like Ford Focus)?

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Anyone using ford two-wire idle valve (like Ford Focus)?

Postby Jon k » Mon Mar 19, 2012 7:22 am

Hi all,

Going to give a go on a Ford 2-wire idle valve. I was wondering if anyone knew what frequency and general settings it likes to be run at.

Image

Any info at all is greatly appreciated!

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Re: Anyone using ford two-wire idle valve (like Ford Focus)?

Postby Matt Cramer » Mon Mar 19, 2012 10:12 am

Most Ford IACs seem to run at around 300 Hz on the stock ECU, but can be driven at a lower frequency.
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Re: Anyone using ford two-wire idle valve (like Ford Focus)?

Postby Jon k » Mon Mar 19, 2012 12:39 pm

Matt Cramer wrote:Most Ford IACs seem to run at around 300 Hz on the stock ECU, but can be driven at a lower frequency.


Do you have good response around 200 - 300 hz? I am going to install the air hose biased to one side of my intake plenum. I don't suspect that it'll make a difference but the factory idle valve was plumbed centrally. Do you know if this valve has a wide gamut of PWM control? Or is it narrow, like 40 - 60%?
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Re: Anyone using ford two-wire idle valve (like Ford Focus)?

Postby Matt Cramer » Mon Mar 19, 2012 1:43 pm

IIRC, the Mustang valve we tested seemed to go from 50% to 0%.
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Re: Anyone using ford two-wire idle valve (like Ford Focus)?

Postby Jon k » Mon Apr 02, 2012 5:07 am

Matt Cramer wrote:IIRC, the Mustang valve we tested seemed to go from 50% to 0%.

Hey matt

Just getting around to testing this valve - put it on the car and couldn't get much reaction. It defaults to being "open".

I brought it into work and put it on a 14v 5A power supply - when I tap the leads to one way I have the current clamp light come on the PSU so I think that's less than ideal. If I flip the leads around I hear the valve go "ca-plop" like it wants to move, but nothing moves. Should the valve close? Do you have one you can test? Or, does it need PWM to close (though I would think holding it to +14v and GND would be 100% DC).

Thanks!
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Re: Anyone using ford two-wire idle valve (like Ford Focus)?

Postby jsmcortina » Mon Apr 02, 2012 5:24 am

Sounds like the valve is faulty.
The one on my car (very similar) takes about 1A and moves easily.

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Re: Anyone using ford two-wire idle valve (like Ford Focus)?

Postby Matt Cramer » Mon Apr 02, 2012 5:30 am

jsmcortina wrote:Sounds like the valve is faulty.
The one on my car (very similar) takes about 1A and moves easily.

James


Another reason the valve sounds faulty: Most Ford IACs we test seem to default to closed.
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Re: Anyone using ford two-wire idle valve (like Ford Focus)?

Postby Jon k » Mon Apr 02, 2012 6:09 am

Weird - it's brand new out of box. It has the spring inside the one port. I read in another thread that the valve requires engine vacuum to draw the plunger shut and the solenoid pops the plunger open.
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Re: Anyone using ford two-wire idle valve (like Ford Focus)?

Postby jsmcortina » Mon Apr 02, 2012 6:11 am

Jon k wrote:Weird - it's brand new out of box. It has the spring inside the one port. I read in another thread that the valve requires engine vacuum to draw the plunger shut and the solenoid pops the plunger open.

In that case then you need to apply vacuum to it to test it. Mine doesn't work that way.

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Re: Anyone using ford two-wire idle valve (like Ford Focus)?

Postby john.p.clegg » Mon Apr 02, 2012 10:37 pm

Jon

Polarity,I blew a couple of these,mine had inbuilt diodes across the coil , check for small + or - by the connector,you may have blown it..

John :cry:
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Re: Anyone using ford two-wire idle valve (like Ford Focus)?

Postby jamies » Tue Apr 03, 2012 3:29 am

john.p.clegg wrote:Jon

Polarity,I blew a couple of these,mine had inbuilt diodes across the coil , check for small + or - by the connector,you may have blown it..

John :cry:


X2
our late model (1996-2001) aussie fords had inbuilt protection diodes on the IAC's whereas the earlier ones didnt
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Re: Anyone using ford two-wire idle valve (like Ford Focus)?

Postby The Deviant » Tue Apr 03, 2012 4:21 am

Jon k wrote: I brought it into work and put it on a 14v 5A power supply - when I tap the leads to one way I have the current clamp light come on the PSU so I think that's less than ideal. If I flip the leads around I hear the valve go "ca-plop" like it wants to move, but nothing moves. Should the valve close?
Thanks!


Last night I was doing some IAC testing as well, and I noticed that a new IAC I had appeared to have a diode clamp in it to prevent reverse polarity hookup; my PSU did the same thing when I wired it backwards - a "short". My valve did, however, default to the CLOSED (i.e. not flowing air when no current applied) state, and I tend to agree with everyone else that thinks they all default CLOSED with no current (I've tested a few of them, all defaulted to CLOSED).

Jon k wrote: Weird - it's brand new out of box. It has the spring inside the one port. I read in another thread that the valve requires engine vacuum to draw the plunger shut and the solenoid pops the plunger open.


I have also read that some Ford IACs need the vacuum to work properly - although I can't speak to the validity of that statement, as neither of mine require a vacuum to work.
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Re: Anyone using ford two-wire idle valve (like Ford Focus)?

Postby Peter Florance » Tue Apr 03, 2012 4:24 am

john.p.clegg wrote:Jon

Polarity,I blew a couple of these,mine had inbuilt diodes across the coil , check for small + or - by the connector,you may have blown it..

John :cry:

I can confirm the diode
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Re: Anyone using ford two-wire idle valve (like Ford Focus)?

Postby Peter Florance » Tue Apr 03, 2012 4:28 am

There is a + and - on the connector IIRC
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Re: Anyone using ford two-wire idle valve (like Ford Focus)?

Postby Jon k » Tue Apr 03, 2012 6:07 pm

Thanks for all the feedback guys - I could not see a + or - on the connector and the pigtail I received had 2 white wires. Hrm.

Well, assuming its shot, can anyone provide a PN# for a valve that they are using and like?

I did some testing of a Bosch 3-wire and I like the potential but I'd have to run another wire through the harness I made (very clean mil-spec style) in order to use it.
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Re: Anyone using ford two-wire idle valve (like Ford Focus)?

Postby Peter Florance » Tue Apr 03, 2012 7:26 pm

Jon k wrote:Thanks for all the feedback guys - I could not see a + or - on the connector and the pigtail I received had 2 white wires. Hrm.

Well, assuming its shot, can anyone provide a PN# for a valve that they are using and like?

I did some testing of a Bosch 3-wire and I like the potential but I'd have to run another wire through the harness I made (very clean mil-spec style) in order to use it.


I think I brought it up slowly on my 12v variable supply and tried each direction. One drew a lot of current; one didn't

Or put a 12v light bulb in series to limit current while testing polarity
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Re: Anyone using ford two-wire idle valve (like Ford Focus)?

Postby Jon k » Wed Apr 04, 2012 11:14 am

Peter Florance wrote:
Jon k wrote:Thanks for all the feedback guys - I could not see a + or - on the connector and the pigtail I received had 2 white wires. Hrm.

Well, assuming its shot, can anyone provide a PN# for a valve that they are using and like?

I did some testing of a Bosch 3-wire and I like the potential but I'd have to run another wire through the harness I made (very clean mil-spec style) in order to use it.


I think I brought it up slowly on my 12v variable supply and tried each direction. One drew a lot of current; one didn't

Or put a 12v light bulb in series to limit current while testing polarity


Yeah I use a Kikusui PMC18-5A with variable current output with a clamp, but the first time I tested was on the car... with a 7.5A fuse (all I had at the time). So, hopefully the valve is just borked and not the ECU.
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Re: Anyone using ford two-wire idle valve (like Ford Focus)?

Postby 9secz » Mon Apr 30, 2012 8:41 pm

I was going to start a thread, but this one is close to the question I want to ask. I'm adding an IAC to a Duratec 3.0 V6 application that didn't come with one. Looking through Rock Auto listings for the various Ford and Mazda models that did come with an IAC, it seems there are many IAC part numbers that all have the same form factor. Can anybody recommend a particular valve part number that has worked well?

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Re: Anyone using ford two-wire idle valve (like Ford Focus)?

Postby Peter Florance » Tue May 01, 2012 2:26 am

9secz wrote:I was going to start a thread, but this one is close to the question I want to ask. I'm adding an IAC to a Duratec 3.0 V6 application that didn't come with one. Looking through Rock Auto listings for the various Ford and Mazda models that did come with an IAC, it seems there are many IAC part numbers that all have the same form factor. Can anybody recommend a particular valve part number that has worked well?

Jeff

I had no issues with the valve once I figured the polarity. I think any of the Ford valves will work; ours had positive and negative signs molded on connecter.
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Re: Anyone using ford two-wire idle valve (like Ford Focus)?

Postby Deuce8ernerozero » Fri Oct 10, 2014 5:18 pm

Did you ever get your Ford focus pwm idle valve settings dialed in? I'm intrested to see what your settings are.
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