Tachometer Wiring is there a way to hook it to the coil cause i have tryed to use the computer and it dont get a reading i have a 94 z 28 camaro thanks for any of the help on the tach the wires are green red black red being + black being ground and green signal

 

The Tach wire should be on one of the Plugs coming off of the OPTI, check into it. The one that comes off of the Computer reads from the OPTI.

 

ok ill try that thank u