kypraio Posted March 22, 2017 Report Share Posted March 22, 2017 Hey guys,Shop is installing a G4 RX into my S4 rx7 and apparently can't get the tach to work saying it's not compatible. Is this true? Thanks Quote Link to comment Share on other sites More sharing options...
Simon Posted March 22, 2017 Report Share Posted March 22, 2017 I'm no RX7 guru but there is a good chance the Tacho was driven off a coil negative signal in which case it will need to be internally modified. Or you can use a relay coil switched by the ECU to recreate a coil negative signal. Quote Link to comment Share on other sites More sharing options...
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