I agree with Roger on all points. As noted in one of my previous posts when my SU stopped working, as a temporary measure I fitted a Facet pump. It did the job but I disliked the noise it produced, despite the insulating and sound proofing I did during its installation.
David W: have you checked the petrol supply pipe to the carburettor which runs along the chassis? The location of the fuel pipe is conveniently situated for it to be trapped by an unsuspecting mechanic when jacking up the car.
Irrespective of what pressure you have in the pump, the flow will be reduced if the pipe has been squashed or deformed.
Brian
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