jrettenmayer Posted September 23, 2009 Share Posted September 23, 2009 Under the steering column on the 1990 Legacy I've slowly been stripping of parts, there is a gold box I thought at first was the ECU, until I realized the ECU was to the left of it. This box has three black plugs going into it and the letters "EF" printed on the side. What is it? And do I need it for the EJ-EA swap I'm trying to put together? Link to comment Share on other sites More sharing options...
Numbchux Posted September 23, 2009 Share Posted September 23, 2009 auto transmission control unit (TCU). unless you're re-using the auto trans, you won't need it. Link to comment Share on other sites More sharing options...
jrettenmayer Posted September 23, 2009 Author Share Posted September 23, 2009 Thanks - thats sorta what I thought, but the EF made me think perhaps there was somd distinction between the ECU and the MPFI controller and perhaps this was it. Link to comment Share on other sites More sharing options...
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