Could well be; but this fault the OP has established is fuel; so I feel pinpointing it should now be pretty straightforward. It just occurred to me that it is a possibility that the pump electrical feed could be part of it. BUT, my money is on a blocking new main filter (had that on my Range Rover once and it took ages to find - I was young then!) or a collapsing feed tube to the pump.

 

finally the engine is ok. the mechanic has cleaned the tubes number 13 and 19 of the scheme. this morning I traveled about 70 kilometers and I had no problem.thank you all for your cooperation

 

Well done. If it happens again, rather than just cleaning them fit new ones.

 

Do you know any retailer of these spare parts?

 

Hose 19 is the important none, it is NOT a high pressure hose, so any good quality 1/2 inch (13mm) internal diameter fuel hose will do it.
Hose 13 (actually 11) is a breather hose, so if it is clear, probably not to worry. They are available though, part number CBC6346
Jaguar Partno_CBC6346_BREATHER HO_David Manners Group with Alts
and some on UK ebay too.