i installed an obd1 p72 ecu and the conversion harness from jdmshit.com.
my car started up but the rpms did not work.
i tested the ecu on another obd1 car and it worked fine.
i shipped the harness back, got another and this one does the same thing.
any input would be appreciated.
thanks.

 

hmm... got me... does the rpm's work with ur old ecu?

 

yeah, my tach works with the other ecu/harness combo.

 

ttt