W202 C250 TD 97' fuel shut off valve

[Rnewman123]

Yesterday, I had a troube with my C250 TD in that the car just cut-out as I was acceterating to 60mph to join a motorway.
Everything looked OK when I opened the bonnet...but when I checked the fuel pipe after lift pump it was empty....
Later I discover that the voltage going to the IP shut-off valve only turns on momentarily when I turn the ignition....It goes up to 8V to 5 v for a fraction of a second...
I wonder if it could be baypassed to take power from the ignition switch directly? The MB manual says it rins on 11 tp 14VDC.... I do not fancy taking it to a garage as i would anticipate an endless and costly trial and error. Of course I can't take it there either....
Advise appreciated.