The Citreon Picasso low presure fuel pump ise situated in the diesel tank,possibly there may be an access hole under the rear seats,you will need to remove them and the carpet.however the mechanic that fixed mine said there was not an acces hole and droped the fuel tank.if you pump has an intermitant fault and does not start Tap the fuel tank this may help and get you going.
pete, November 2009
