You need an OBD-I code reader I believe.

 

I got mine at Harbor Freight several years ago for $35, if I'm not mistaken. And OBD I is correct.

 

Here is how to read codes without a code reader:

Ford Fuel Injection
Ford Ranger/Bronco II EEC-IV Testing

 

I got one of these: Kastar Ford EEC-IV reader (link below). It is not a hand-held instrument with a digital readout, it is just basically a blinker light attached to wires/connectors that make it simple plug and play to hook up to the code-delivering plugs on the truck. Since you can read these codes with just a voltmeter and some wires, this thing does the same thing but makes it more convenient. Its advantage is it is small, lightweight, and cheap. It comes with good instructions for use.

I haven't used it yet because my truck is running great and I figure that pulling codes would just create worries. Kind of the same principal that advises you should never, ever pattern your shotgun.

FORD EEC-IV DIAGNOSTIC ANALYZER MADE IN USA KASTAR | eBay

 

Myself, I tend to wonder & worry more when I *don't* know if there's something needing attention and can be made better. Being blissfully ignorant is just an excuse to not take responsibility.

I pulled the codes on my DD a few weeks ago and learned my TPS was bad and it was THAT that was causing some weird idle problems at times.

 

You are right ctubutis, of course. I can't defend my position from a logical standpoint! I do plan to pull my codes soon (shudder).

 

I know this is an old thread but I have an 86 with the inline 6 and I couldn't find a computer or an "eca". Is it behind the driver's side kick panel?

 

I know this is an old thread but I have an 86 with the inline 6 and I couldn't find a computer or an "eca". Is it behind the driver's side kick panel?

 

Do you have a 3.9L (240ci) or 4.9L (300ci) ?

 

i have the 4.9

 

I am not positive, but I think it's mounted up high over the trans hump under the dash.

 

Ok. I'll look I'm just hoping I didn't fry it with that starting problem I'm having.

 

To the left of the ash tray. It is mounted vertically.

 

so I have a 1986 ford f250 7.5l where is it located at

 

I don't believe the 7.5L was fitted with EEC until 1988.

I'm guessing you have the Duraspark ignition system wired up to your distributor & coil.
I believe the ignition module is mounted on the drivers side fender apron.