Sometimes don’t jump..

Have a question,I have Ford Escort Bj 93,105 ps,1.8,16.v -DOHC,and it’s so that sometimes he doesn’t jump in… it happens quite rarely,but if I keep standing somewhere, park briefly or something else, turn off the engine and then when I want to turn on again,he doesn’t jump on,at the same time I don’t hear a noise of petrol pump,there I can do what I want,but doesn’t jump on,but I’ve noticed only one thing,if someone scrapes me with rope,then I make 2 gears in and ignition and press the clutch pedal and let go, so I do 10 or 20 times during the slipping and then it starts again,even if I immediately turn off the car and start ignition again hear that petrol pump goes,,, then I can continue driving, and hope that at the next stop it does not happen again.. What could it be relay ??Wackle contact , ?or still what ? Do not woch so long in Germany and don’t know the language so well ,but I think you understand what I’m saying No, no, no, no, no, no, no, no, no.