Has anyone done to their corsa mines written of with full tank of petrol in...and tried with pipe through petrol cap but was only getting surface of petrol if i tried push it anymore it would miss it completely
As I see you have 1.0 B, and I know on this fuel filter is under the drivers side door. I'm not sure if the fuel pump is before or after the filter, but if its after you can just take of the filter and the fuel will just drain out into a fuel canister.
If the fuel pump is before the fuel filter, you could try taking the car battery and directly wiring it to the pump (after the fuel filter has been disconnected), this will make the pump just push the fuel out of where you disconnected the fuel filter.
I did the battery option with a mate on an old Micra a few weeks back. I'm not sure if it's an option on the Corsa. And ofcourse, there's some safety precautions you should probably follow when doing this, like keeping away battery sparks from fuel.
But I will let someone else agree or disagree with my battery option... Might be different on a Corsa.
Pump is before the filter - it's in the tank. If you leave the tank sealed and either do as above with a 12v source it's safe - or if you have Opcom you can turn on the fuel pump remotely which is the way I do it.