Start up problem

[nicoroche86]

First time poster so may be in wrong section... Recently had a problem with my citeron berlingo van. First thing in morning starts up fine but once it’s warmed up won’t restart until cool again. Also the Rev counter has been moving on its up and down. Had the starter motor replaced and today the crankshaft sensor and still not right. Anyone any idea?? Citeron berlingo diesel 1.6hdi starting to stress me out 🤷‍♂️