Desprately trying to fix my laguna. Help and advise needed PLEASE! (2002, 51 plate, Mark 2, 2 LTR IDE 16V Petrol Laguna) History: April 08 - in traffic car cut-out 'fuel injection fault' light came on. Wouldn't re-start. AA came out 45mins later. Car started and got home without cutting out again. Took to Renault they told me senors needed. Had replaced. OK for 4 weeks. Began to cut-out again whilst in traffic. Wouldn't start. Left to half hour then car started and got home. Car then kept cutting out but re-starting again so regularly I took back to Renault. (Fuel injection fault and ESP lights coming on). They told me high pressure fuel pump needed and maybe spark plugs interfering with perimeters. Had genuine fuel pump fitted by mechanic friend. Still same problem, not the fuel pump. Changing spark plugs and cleaning injectors tomorrow. Any suggestions????