mojojo Posted September 20, 2012 Report Share Posted September 20, 2012 When switching ECMs between different cars (same model - 850), what do I need to follow as a guide line? i.e. a 4.4 ecm goes with another 4.4 ecm? Different years that may be compatible (i.e. 95->96, 96->97, etc...)? Link to comment Share on other sites More sharing options...
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