[jondee86]

While the fuel pump is grounded to the tank by the fixing screws, the
tank is not necessarily grounded to the chassis. The tank has rubber pads
and a rubber lining on the holding straps. Therefore the ground wire from
the FP plug should have a good connection. Test the body side connector
and make sure the ground wire from the plug shows zero resistance to
the chassis.

Then, if you are sure the FP is running when it has 12V, check to see how
much fuel is reaching the rail. Did you change the fuel filter ? There is
probably a lot of rust in the tank, and it could be blocking either the filter
on the pump inlet, or the filter in the engine bay.

If you have an AFM, check the FP runs when you manually open the flap
with the key turned on.

Cheers... jondee86