Electrical Problem on a VQ V8 Statesman

[VL-TWM]

To anyone who could help me,

The engine turns over but will not start. I know it is an electrical failure, but I am not very experienced with electrical things, so I was wondering if someone could tell me where to start looking? The engine was just running, but now its not even firing. The car is LPG and it was just recently serviced, so im pretty sure this isnt the problem. I also replaced the ignition module so i dont think that is it either.

Any reply would be appreciated.

[ss350chev]

It could be the diode on the tank or engine bay,it shuts off the gas supply if something is wrong.Or could be the coils.