Originally Posted by JohnDeerCJ
I ordered a new ignition cylinder but i have NO CLUE how to replace it...
Most likely not the problem. The key cylinder, as it turns, moves a rod (hidden on top of steering column) which actuates the ignition switch (also on top of the steering column. It can be seen under the dash in front of the brake pedal).
It seems as if your rod is moving. The switch can be adjusted by loosening it's two mounting screws and sliding it forward or aft. I would try moving it forward a little.