1986 EEC-IV engine computer
Moderator
Joined: Nov 2007
Posts: 22,415
Likes: 92
From: Denver Metro Area, CO
Here is how to read codes without a code reader:
Ford Fuel Injection
Ford Ranger/Bronco II EEC-IV Testing
Ford Fuel Injection
Ford Ranger/Bronco II EEC-IV Testing
Fleet Mechanic
Joined: Jun 2010
Posts: 1,251
Likes: 8
From: North Carolina
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
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
Moderator
Joined: Nov 2007
Posts: 22,415
Likes: 92
From: Denver Metro Area, CO
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.
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.
Fleet Mechanic
Joined: Jun 2010
Posts: 1,251
Likes: 8
From: North Carolina
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.
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.
Junior User
Joined: Feb 2017
Posts: 84
Likes: 0
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?
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Cargo Master
Joined: Jun 2013
Posts: 3,174
Likes: 15
From: Somewhere n North America
Do you have a 3.9L (240ci) or 4.9L (300ci) ?
Cargo Master
Joined: Jun 2013
Posts: 3,174
Likes: 15
From: Somewhere n North America
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.
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.