Ok basically car cut out whilst driving, got it started once cooled then cut out again 5mins later, then towed home. AA man said need a new fuel pump, however checked around and most people with similar problem say its down to the relay. Checked relay which had some mild corrosion and was getting unusually hot with car running (then car cuts out). Got new relay and fitted it, car started, but after leaving it running for about 20mins or so it cut out again. And the relay was really hot again. Any thoughts?