Ford: focus high idle!!

Doug,

If it hasn't done it for 64,000 miles then it sounds like you have a
concern. There is a normal delay of idling down after the clutch is
depressed to keep the engine from stalling however 3000 rpm's sounds
excessive.

One problem I've seen on many ford's is a defective IAC (idle air speed
control). This component is regulated by the processor and controls the air
bypassing the throttle plate to control idle. The symptoms of a defective
IAC are high idle or no idle (Stall). It's either one or the other. The
IAC mounts at the throttle body and simply allows air to flow at a
controlled rate past the closed throttle plate.

An IAC concern is usually not detected by a scan tool (code retrieval).

The other component that will affect the idle speed is a mass air flow
sensor. This component is located at the air filter box. It's symptoms are
usually erratic idle speeds and/or bucking/hesitating on acceleration.

If your symptoms are always exactly the same and you sure it didn't do it
before my money would be on an IAC.

Hope this helps,

John


"Doug Stewart" <com> wrote in message
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Your description of what the IAC does is exactly as the tech at the dealer
explained it. He also said it's controlled by the computer.

When it first started, I stopped at another dealer and he said it sounded
like an AIC problem. SO I took it to my regular dealer and you can see the
response I got.

Can I install this myself? Or is something a dealer has to do?

Thanks,
Doug

"PC PODD" <com> wrote in message
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air 
are 
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In searching the web for the part... I found an "Idle Speed Control" for my
focus. Cost $68 list price, does this seem correct? If so.... can I find
documentation on how to install it or is it pretty simple. I'm worried that
something in the computer may need reprogrammed.

-Doug
com

"PC PODD" <com> wrote in message
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air 
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engine 
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Doug,

I just spoke to a friend at a ford dealer and he gave me the part #. There
are two different #'s. The single cam engine takes a ys4z-9f715-AA. The
dual overhead cam engine takes n XS6Z-9f715-AB.

He also said he doesn't sell very many of them. The cost is $68.00 for
either.

The one thing he said he does sell alot of are the DPFE sensors. He said
they are going bad left and right on the focus.

With that being said, it's been a while since I've seen a focus engine but
for the most part IAC's are very simple to replace. Two bolt's requiring a
ten mm socket will remove it and I believe it has a rubber o-ring/gasket.
You will not have to reset anything on the computer however it may have
learned a few bad habits. If this is the case simply warm the engine to
operating temperature, shut vehicle off, disconnect the battery for 5
minutes, reconnect and go for a nice long road test. The proper drive cycle
test consists of multiple stop and go's along with steady driving and yada
yada yada. Just drive the vehicle like you normally would and you will be
fine.

Once again, your sure it hasn't happened in the past?

Good luck,

John
"Doug Stewart" <com> wrote in message
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"Doug Stewart" <com> wrote in message
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Should just involve removing the connector and two bolts, replace gasket and
the IAC, and reinstall bolts and connector. Probably should either
disconnect the battery or reset the computer to defaults (if you have a
scanner) as well.

Well for $68, I'll do it myself. Rather than paying my dealer $66/hr to
monkey with it.

Thanks,
Doug
com

"Stephan Mynarkiewicz" <white1*com> wrote in message
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find 
and 

Been fine for nearly 60,000miles...never done it before.

What is the DPFE sensor, forgive me for being uneducated in the million and
one sensors in a ford. ;-)

Yeah, I have the DOHC engine, the Zetec 2.0L. Thank god...the split port
2.0L (SOHC) sucks.

Thanks,
Doug
com


"PC PODD" <com> wrote in message
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"PC PODD" <com> wrote in message
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cycle 

The comprehensive procedure if you're really anal retentive (and have a
scanner that can read real time data):

http://www.obdii.com/drivecycleford.html