Crank sensor location! No spark!!!

Hi im new to the forum and would be grateful if anyone could please help me. I have a 1993 audi coupe 2.3e ng engine B4 that has no spark. It has a new battery and the coil works as i tried it on my B3 with the same engine and it started. The coil module is ok and the plugs leads dizzy cap and rotar arm are all new. Ive been told that the car doesnt have a cam sensor but has an ignition pulse sensor in the distributor also known as eye of the distributor instead. I need to replace the crank sensor but cant find where it goes. Could anyone please tell me if they know? Any help or advice would be much appreciated! Thanks Ian!!!!