ok this is what I have going on
91 crx hf
obd0-obd1 jumper then obd1-obd2b jumper for ems dont laugh got a great deal on the ems but i know it sucks lol

i got the t1 trigger kit and did the cop conversion using k20 coils but I cannot figure out how to wire the stock tachometer in the jumper harness the tach wire connects to the coil #1 wire but nothing will feed back to the dash from the dizzy harness since the dizzy is gone.
anyone have any input or am I overthinking it?

thanks
chris

 

Which ems? Mayb there's a tach signal output at the ecu u can use

 

1050 box i believe there is an output on the b plug
so just hook the the output to the wire going to the cluster?

 

Pin A19 on the ems would go to your Tach.