Dear Colleagues!

Could somebody help me on my Dacia Logan?
Some times engine does not ignite. I drove about 50 km switch off the engine but doesn't start. After a half an hour the engine start normally. In this day on every attempt the engine started. When i didn't drive for one day, the engine hardly start. Next day it started to cough on first start. After all was normally. For time to time the engine doesn't start, or starts hard. Could anybody help or send me the checking procedure on ignition system, flow chart in English, in German. I have found the procedure MR390X9017B000 DK.pdf (which is in Danish) chapter 17B which describes benzine inpuit system.
Thanks in advance

faulty cranckshaft position sensor-CKP sensor !
try to unmount and clean it with a brake-cleaner spray !
1-CKP sensor....

Hi Sobolan!
Thank you for your help! I have cleaned the sensor but the problem remained. Do you have anyother suggestion for the problem?

I think the suggestion of a faulty crankshaft position sensor is a good one. I had a similar problem (of the car not wanting to start, or cutting out) in a Renault Megane I which had the same type of engine. The most serious occurence was when the engine stopped in the middle of a wildlife park!
The sensor can deteriorate with time (I believe it's an electromagnetic device) and it's well worth replacing it, not just cleaning it, to see if it solves the problem. The sensor is not expensive (less than 40 euro I think).
Hope it helps!
Pollux