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Hi - You have a nice looking car. The problem you have sounds like possibly you are
loosing energy in your spark, or it's intermittent, and then quits as it gets hot.... It
looks like there are 2 engine modules in that EEC III system from what I have found
online... We have had a number of Fords of those years and never any ignition
problems.... I did find a few resources you might find helpful...
Also check out fuel pump relay, & power to the EEC be sure it's
getting to the modules & staying on and steady.... (Possible relay there too).
YT video to get codes off computer...
https://www.youtube.com/watch?v=puAEJ3BYFeY
I bet there are many more... as a matter of fact YT should be the best place to look
for help with this as it's an old and well known system.
A few forums that have posted about the EEC III System.
This pic shows 2 modules in the system....
https://www.mustangevolution.com/att...iii-gif.31991/
Forum questions about EEC III Gen Diag.
https://www.garysgaragemahal.com/#nabble-td75706
1982 engine emissions diag.
https://www.garysgaragemahal.com/198...diagnosis.html
Ignition Systems.
https://www.garysgaragemahal.com/ignition-systems.html
All EEC Systems Ford Used.
https://www.garysgaragemahal.com/ele...ntrol-eec.html
My Dad had a '86 T-Bird with 302, spit injection, & AOD trans, it lasted over
150K miles until sold for a newer car and the new owner kept it for
many many more miles....
My '88 Dakota has spit injection too - Very good!
Good Luck.
I would not change out the system to something older.
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