Ford Mustang EFI System Tuning - Inside The Black Box Part 3 - Tech
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For EEC V systems, the ECU can still make use of a J3 device, but internal memory became flash reprogrammable. Through the magic of OBD-II (and we all thought it would be a bad thing when it came out in 1996), you can now use a Flash Tuner tool such as the DiabloSport Predator or SCT XCalibrator to simply flash a new tune into your EEC through the OBD-II service port, without ever having to "find" your actual ECU. For '05-and-newer Ford ECUs, the J3 port is now gone, so flash tuning is your only option. An advantage of flash tuners over chips is the ability to integrate OBD-II diagnostic features into the hand-held unit, such as service code retrieval (and clearing), and data logging of the EEC sensors and actuators. View Related Article
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