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1986 EEC-IV engine computer

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Old May 19, 2011 | 12:02 PM
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lildrummer420
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1986 EEC-IV engine computer
i drive a 1986 3.9l I6 1bbl carb. f-150. where is the EEC-IV engine computer located at and how do i access it to read the codes?
 
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Old May 19, 2011 | 12:30 PM
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RAY1986F150
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Im might be wrong, but if its carburated then it shouldn't have a computer. I thought EEC-IV was for fuel injection.
 
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Old May 19, 2011 | 12:51 PM
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Originally Posted by RAY1986F150
Im might be wrong, but if its carburated then it shouldn't have a computer. I thought EEC-IV was for fuel injection.
The EEC-IV or TFI-IV systems are the models with the feedback carburetor.


 
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Old May 19, 2011 | 01:10 PM
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Originally Posted by RAY1986F150
Im might be wrong, but if its carburated then it shouldn't have a computer. I thought EEC-IV was for fuel injection.
The EEC-IV / TFI-IV system was for both EFI and Feedback Carb systems within the years 1984-1987 etc... after 1988 it was EFI only etc...

Feedback Carb Systems 1980-1983 used the EEC-III / DS-III or the MCU / DS-II system on the pickups.

EEC-I and EEC-II were for cars "pintos etc.." and started in 1978.
 
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Old May 19, 2011 | 01:11 PM
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You need these plug

They are located on the passenger side fender in the engine compartment.
 
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Old May 19, 2011 | 01:19 PM
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does the code reader plug into these?
 
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Old May 19, 2011 | 01:20 PM
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yes. Theres 2 single plugs. Mine uses the green wire.
 
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Old May 19, 2011 | 01:23 PM
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where can i pick up a code reader? and does it come with descriptions of what the codes mean?
 
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Old May 19, 2011 | 01:25 PM
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Autozone has them for about 35 bucks. Yes it comes with a book that explains the KOEO and KOER tests. with all the codes.
 
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Old May 19, 2011 | 01:26 PM
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awesome thanks very much
 
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Old May 19, 2011 | 01:40 PM
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Originally Posted by billt28
You need these plug

They are located on the passenger side fender in the engine compartment.
Or on the drivers side inner fender, depending on year.
 
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Old May 19, 2011 | 01:53 PM
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His is an '86. Same year as mine.
 
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Old May 19, 2011 | 03:03 PM
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RAY1986F150
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Originally Posted by Grubbworm
The EEC-IV or TFI-IV systems are the models with the feedback carburetor.


Well, being that I am a chevy guy, I guess I got told huh? I had no idea a thing such as a feedback carb even existed! Did chevy's ever have a carb similar to this feedback carb?
 
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Old May 19, 2011 | 03:15 PM
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AutoZone may or may not have the reader. The ones around here do not carry them anymore for anything less than the newer systems. But if you do a search on here you"ll find a writeup on how to read them using a hot wire finder. It works good. Check on the Inline 6 forum on here.
Keith
 
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Old May 19, 2011 | 03:18 PM
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i found a digital readout one on amazon for $20. advanced had one in stock but it was not digital and was $10 more
 
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