'94 Escort idle problems - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Forum Ford Forum

» Auto Insurance
» Featured Product
ยป Wheel & Tire Center

Go Back   Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > Fordforums Community > USENET NewsGroups > alt.autos.ford
Register Home Forum Active Topics Photo Gallery Auto Loans Garage Mark Forums Read Auto EscrowInsurance

FordForums.com is the premier Ford Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 09-06-2005, 09:01   #1 (permalink)
dallison.remove@mindspring.com
Guest
 
Posts: n/a
'94 Escort idle problems

I have a 1994 Escort 1.9L with 142,000 miles. When the engine is cold,
the idle "hunts" up and down. When it's warm, it's steady. However,
when I decelerate and come to a stop (clutch in or in neutral), it
hunts again 5 or 6 times before smoothing out. When the a/c is on, it
dies on deceleration.

I suspect the idle air control valve. When I unplug the electrical
connection to the valve with the engine warm, the hunting stops though
the idle is a bit rough. If I unplug the valve with the engine cold,
it dies.

I know the valve is responding to the computer which is using info
from various sensors. Before I change the valve, I wanted to see if it
might be one of the sensors.

I changed the oxygen sensor but that made no difference.

There are no stored fault codes.

Any ideas? Thanks!

Doug



  Reply With Quote
Sponsored Links
Advertisement
 
Old 09-06-2005, 10:01   #2 (permalink)
Sharon K.Cooke
Guest
 
Posts: n/a
Re: '94 Escort idle problems

dallison.remove@mindspring.com wrote:
>
> I have a 1994 Escort 1.9L with 142,000 miles. When the engine is cold,
> the idle "hunts" up and down. When it's warm, it's steady. However,
> when I decelerate and come to a stop (clutch in or in neutral), it
> hunts again 5 or 6 times before smoothing out. When the a/c is on, it
> dies on deceleration.
>
> I suspect the idle air control valve. When I unplug the electrical
> connection to the valve with the engine warm, the hunting stops though
> the idle is a bit rough. If I unplug the valve with the engine cold,
> it dies.
>
> I know the valve is responding to the computer which is using info
> from various sensors. Before I change the valve, I wanted to see if it
> might be one of the sensors.
>
> I changed the oxygen sensor but that made no difference.
>
> There are no stored fault codes.
>
> Any ideas? Thanks!
>
> Doug


The IACV is almost 12 years old; get a new one. If the IACV on your Escort is
like most Ford products, its primary input is from the Throttle Position Sensor
(TPS). A bad TPS will throw a code, so it's probably just a worn IACV.
  Reply With Quote
Old 09-08-2005, 06:01   #3 (permalink)
dmtaurus
Guest
 
Posts: n/a
Re: '94 Escort idle problems

Try cleaning it. Take it off and use a carb cleaner to spray in the underside
ports. This frees it up and allows the valve to seat and to open I had the same,
exact problem on my 94 Escort and that fixed the problem and saved a bunch of
moola.

"Sharon K.Cooke" wrote:

> dallison.remove@mindspring.com wrote:
> >
> > I have a 1994 Escort 1.9L with 142,000 miles. When the engine is cold,
> > the idle "hunts" up and down. When it's warm, it's steady. However,
> > when I decelerate and come to a stop (clutch in or in neutral), it
> > hunts again 5 or 6 times before smoothing out. When the a/c is on, it
> > dies on deceleration.
> >
> > I suspect the idle air control valve. When I unplug the electrical
> > connection to the valve with the engine warm, the hunting stops though
> > the idle is a bit rough. If I unplug the valve with the engine cold,
> > it dies.
> >
> > I know the valve is responding to the computer which is using info
> > from various sensors. Before I change the valve, I wanted to see if it
> > might be one of the sensors.
> >
> > I changed the oxygen sensor but that made no difference.
> >
> > There are no stored fault codes.
> >
> > Any ideas? Thanks!
> >
> > Doug

>
> The IACV is almost 12 years old; get a new one. If the IACV on your Escort is
> like most Ford products, its primary input is from the Throttle Position Sensor
> (TPS). A bad TPS will throw a code, so it's probably just a worn IACV.


  Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > Fordforums Community > USENET NewsGroups > alt.autos.ford



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are Off
[IMG] code is Off
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -7. The time now is 09:25.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.