Honda civic si, hatchback,standard,1.6 lts,engine d16z6,, when I open the switch the check engine lights on,then off and the car starts,, if I want to restart,, reopen the switch but the check engine does not goes off and the car does not starts,, you let it without use for about 8 hrs,, and the car starts again normally,, what is happening?

Your ECM is failing on an intermittent basis. Replace it and your problem will be solved.