1995 Ford Escort car won't start

I had this problem with a friend of mine, he has the same car, what I found was the mass airflow sensor was dirty, but before I cleaned it, I checked the filter, it was filthy and the little sponge breather inside the airfilter compartment was saturated with blow by fume build up/oil. So I replaced the breather, the filter, and replaced the pcv valve(which was the reason why the breather was saturated with oil). Problem was solved.