To my knowledge the only way to tune the EEC-IV is with a piggyback card, such as a TwEECer or Moates unit. It wasn't until the EEC-V that you can re-flash the EEC. On TFI modules, never had real good luck with aftermarket ones. If you are concerned about heat, starting in either 89 or 90, Ford moved the TFI module to the inside of the left fender near where the EEC was moved to in 1987. It will require a later distributor and some wiring changes.
Bill AKA "LOBO"
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"Getting old is inevitable, growing up is optional"
Darth Vader 1986 F350 460 converted to MAF/SEFI, E4OD 12X3 1/2 rear brakes, traction loc 3:55 gear, 160 amp 3G alternator
Wife's 2011 Flex Limited
Daily Driver 2009 Flex Limited with factory tow package
Project car 1986 Chrysler LeBaron convertible 2.2L Turbo II, modified A413
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