yesterday i got my car back from renault after they alledgedly changed an engine mount which was kncocking and sorted a misfiring problem out....both of these probems i still have!!got the car home from garage on my way to work last night and i stopped for petrol,filled up got back in car and engine wuld not start,kept turnng over...ended up getting the AA out,they said the fuelk pump was knackered..he gave the petrol tank a few knocks and it started...went to work,finished work and same problem would not start,so i did the same and it started..so i take it the fuel pump is almost dead now aswell...would a dying fuel pump cause low pressure to rail and cause the car to run crap, perform crap,smoke a lot and eat fuel????