Hmmm fuel pressure........... Remove the rear seat base and the left-hand fuel tank blanking plate (passenger side). Remove the fuel pipe, and unscrew the fuel outlet retaining collar. Lift out the fuel outlet and you'll see it's a large white plastic housing, thats springy - it shouldn't be! Grab hold of the base of the white plastic and press down the top, twisting it back into it's bayonet fittings on the side (you'll see what I mean when you get it apart). Refit into the tank making sure the seal is still in place and retry starting!