Thank you all for some new ideas.
Today I undo one sparkplug. Form the first cylinder in the front. Dry. Dry as a desert. But I think it would be time to change them.
So the next step:
New relais immbilizer Bosch 0986 AHO 135 about 10,-EUR
New relais fuel (the same)
New Cam sensor Febi Bilstein 26513 less than 20,-EUR
Sparkplug Bosch (original FORD CYFS 12Y1) about 60,-EUR.
Than we‘ll see.
If this doesn’t work looking how to adjust a new crank sensor and renew it.
When I remove the cam-sensor this morning the screw was easy to open. When I read the (Mazda MX5) Haynes: if the sensor isn‘t fit with the correct (15 or 20NM) could cause misfunction…
So waiting for the parts and greets from Mainz
René