I am looking to put LPG on my car but cannot find the correct wires, I require to have a rpm signal wire or coil negative wire, my model does not have a coil being direct ignition and owners workshop manual does not show details of wiring can anyone help please

 

what engine number? or vin?

 

Vin No WDB1240222C159626. I found a workshop manual published by technibooks but all wiring diagrams are general layout with not much details. I can find voltage to ignition switch and assume that oxygen sensor wires can be traced to plugs under bonnet, hope you can help thanks. alan.