Hi guys,
I purchased a 2nd hand ECU obd2b to obd1 conversion harness..
The harness was home made.. I have tested the harness on a loan ecu (Courtesy of backyard performance), but there is no RPM.
I had a look at the PIN out diagram for the OBD1 ecu and there doesnt seem to be an RPM pin...
what could it be?
any help would be appreciated..
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