Use '94 - early '95 4-wire coils, not the later 3-wire coils. The 3-wire coils don't have tach drivers in them. Remove the old coil pack, igniter, and the wires connecting the igniter to the old coil pack. Connect the two igniter trigger wires from the ECU to the two 1.8 coil trigger inputs (brown, brown/yellow). Connect +12v (the old coil/igniter power source) to both 1.8 coil power inputs (lavender). Connect the chassis tach wire to both 1.8 coil tach outputs (black/white). Connect a 1K 1/2w resistor between the power input and the chassis tach wire (because the 1.8 tach drivers are open-collector). Make sure that the new coil ground wires (black) are grounded to the coil pack bracket and the head. -- Ray Ayala
N.B. -- I assume no responsibility for the diagrams or instructions provided here. I didn't write them -- Admin