hi, its a bit of a nasty job to change the pump over.

try running a direct feed to the pump from the live in the dash, say radio or fag lighter or just off the battery.

a heavy bash with a hammer to the tank can sometimes free them up.

i am not sure of the pump action so cant say if a reverse blow would help.

you must remember the pump only pumps when the engine cranks it may just be a bad connection at the ecu or relay.

take the connector apart thats in the boot and clean it up with a bit of contact cleaner

,do the same with the ecu plugs.

good luck

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