Citroen Xantia hdi(2000) - fuel pressure - tcpmul

Can anyone tell me a way to check if LP pump pressure is adequate to prime HP pump?I have flow from fuel filter housing ,but none to rail.

Citroen Xantia hdi(2000) - fuel pressure - elekie&a/c doctor

You will need to install a pressure gauge between the supply pipe from the tank and the filter inlet pipe.Pressure should be between 2-3 Bar .In real money from around 30-45 psi.hth

Citroen Xantia hdi(2000) - fuel pressure - tcpmul

Thanks for that,I was wondering if anyone knew a quick check eg fuel from filter housing just flows or hoses out.Will the HP pump need a minimum inlet pressure to work,?