fiat uno Bj.91 doesn’t start much practice seems bar insoluble problem

Hi@all got a fiat uno Bj.91 from my uncle last week. the uno got 2 yesher but jumped on immediately. got a full acceptance. so now the problem: in the night from Friday to Saturday you got me the petrol hose that goes up from the filler nozzle to down to tank on cut and benzin tapped. So I drove about 20 km to get spare parts, was only a pump for the wash unit and a belt for the driver sitting and the benzin smartc h. when we changed my father and I the parts out the car didn’t jump any more. let’s start turning around otherwise nothing passes. have first looked for if someone else has poured gasoline in the tank but clean comes in the front also over all. then we looked if a spark of ignition comes nothing, and hir is that problem buried have all the safeguards checked no capput, ignition coil from exchanged nothing did have changed also the control mudul hir did sic h also nothing. I hope hir can help me further thank you in front of out