any sensible advice most welcome, i have an "s"reg. megane scenic 2.0 litre petrol which is having start up problem. basically the engine turns over o.k. but wont start. then with no "coughing" the engine will fire up o.k. ( obviouslly when turning ignition) and will run smoothly until i turn it off. then problem starts all over again. sometimes start up may take a few seconds, other times a couple of mins. any guidence most gratefully recieved.