1989 topaz, intermitent stalling

My folks have an 89 topaz, four cylender with air. First they tell me that it was making a "howling" noise which turns out to have been the
power steering fluid- low. Added fluid, that fixed the howling. But the car has been stalling, on right turns. I drove it for twenty minutes today and couldn't get the thing to stall. A couple months ago they complained that the engine was idling too slow, and tended to kill unless they kept up on the peddle. I adjusted the idle speed and that seems to have fixed that.
The steering and idle issues may be irrelevant but I mention them because:
a) The low fluid in the steering may have caused a drag on the belt hence dragging the rpms down.
b) Cranking the idle up may not have been the best way to address the initial idle problem.
I thought this engine had a diagnostic computer that could be accessed somehow i.e. flashing a code with the check engine light. Does anyone know if it does have a computer, and how to get the codes out?
The check engine light has been on for quite some time, I suspect that this is an O2 sensor but for some reason dad won't have that changed.
He's had it in the shop many times, but no one seems to address the engine light issue for some reason. The car was not acting up originally when the light was on so it could be a short in the light system, but...
Fuel pump has been replaced in the last two years Fuel filter likewise. Tune up last summer Ignitiom module replaced last winter Cooling fan motor, car is not overheating
I replaced all this stuff as it failed not because I was guessing at what was causing the stalls.
Any idea's or info on the computer would be appreciated.
Paul.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Indeed, 'cranking up' the idle speed was not a good idea. In fuel injected vehicles idle speed is computer controlled and not adjustable. I bet that it even says so on the emissions sticker under the hood.
All you (or your dad's "mechanic") need to read the trouble codes is a paper clip and a bit of knowledge. Try googling for something like 'EEC IV Codes' or EEC IV Diagnostics'. Here is one that I found in about 20 seconds: http://www.off-road.com/ford/bigbroncos/tech/eec / (this one is a Bronco site, so a few codes may have a slightly different inerpretation, but it will get you close)
I would strongly recommend to whoever is attempting to repair this vehicle to acquire a bit of knowledge instead of more parts. You could start with Charles Probst's excellent "Ford Fuel Injection & Electronic Engine Control 1988-1993", or even one of the Haynes manuals.
Good Luck

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

I've got the Chilton's manual.. very much useless. Any idea where the EEC IV test port is in the 89 Topaz?
Thanks,
Paul.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

If it's like my 1988 Topaz, there are two sockets on the right hand side, under the hood (Brit: bonnet).A Haynes manual will explain how to read the codes with a multimeter.
Steve R.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Pdigmking wrote:

If I remember correctly it's near the right front strut tower. It should have a cover on it that says EEC Test or something like that (Unless the cover was removed at some point). Check out www.troublecodes.net They should have an illustration and procedures for testing.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.