problem with it getting to crank over

I have a 1995 318i standard 4 cylinder. I am having a problem with it getting to crank over. I have changed all the park plugs and spark plug 1&2 were arking and 3&4 were covered in oil. Put new plugs in and now the car wont crank over. It has fire but wont start. Can u please tell me what might be the problem!