C20ne starts then but again out of white no more…

Hi, I have a problem with my 92ner Calibra, motor is a c20ne. When I turn it on but in the empty run it goes out as if you turn the ignition key. Sometimes he wants to deal with more garnet and then you have to wait half an hour and jump on and go out again I know net more, sometimes he doesn’t run and when he lashes I don’t know how long (times 2min. or 30min.). I already have the air flow meter, control unit, fuel pump relay, petrol filter, S pritpump, spark plugs replaced. Oh yes the idle controller has been cleaned by me, which looks almost like new. But I also connected another LLR but always showed the same reaction. Does that bring what if I spray contact spray somewhere zb. Ignition distributor? Hope you can help me. I’m really desperate and not only I 3 experts also didn’t know any advice.