I have a Renault Laguna 1.9 DCI the starting problem is intermittent it sometimes does not start in the morning but will after giving a sniff of easy start. Then when it stops will start again or even after a few hours but then when you drive it and stop it won't start again, without easy start. I have changed the fuel filter twice, changed the glow plugs and when i have been into the fuel tank and cleaned the sender unit which is working ok it then starts ok everyday for about 1-2 weeks then starts the problem all over again. I have cleaned the EGR. Tested fuel pressures. It also cuts out on long journeys it will go for approx 2-3 hours then it cuts out and will not re start. There is no fault lights showing on the dash can any one HELP!