doing lfx 3.6 swap into my 1990 Cutlass , i want to know if there is a way to have output signal for tach and speed from e39 ECM like what we do about older ECMs like e38 or 411...
doing lfx 3.6 swap into my 1990 Cutlass , i want to know if there is a way to have output signal for tach and speed from e39 ECM like what we do about older ECMs like e38 or 411...
No, the e39 does not have a tach output. Drive the tach thru can buss, coil pack drive , or alternator. Steve
thanks Steve for your reply ... yes I found the same answer and can you let me know about using alternator for the tach?
and can i use brake module speed signal for speedo ?!
Originally Posted by EFIHARNESS
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