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Ford Mondeo 2009: Fuel pump failure

My son has had a 2009 2.3-litre Ford Mondeo for about two months, and two weeks ago it would not start. We took it to Ford and after a few arguments they agreed to replace the faulty fuel pump under warranty carried over from the previous owner who had the pump replaced by the dealer in July this year. Less than one week after having pump fitted it wouldn't start again. The symptoms were the same as previous. This time I investigated a little more and checked the level of fuel in the tank. By hitting underside of tank the car started. Could it have an earthing problem, or a blockage?

If you can hear the pump start running when you hit the tank then it could be an earthing or a connection problem, but it could also be a blockage. It's a good idea to refill your tank before the fuel level drops close to empty when there is a much higher chance of the pump picking up rubbish on the bottom of the tank.

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