90 leagacy not starting

I have a 90 legacy 5 spd awd. For the past four days its refused to start. Theres gas, spark, and the starters fine. Anyone have any ideas?

If theres gas and spark, then its gotta be air. check your intake for obstructions, perhaps the MAF (or MAP) sensor is broken.

Any work recently done to the car?

Thanks for the advice,will check it out tomorrow, hope thats it. Only recent work was the belt for power steering flew off about a week ago, replaced it had worked fine. About a month ago i had a frozen gas line (ironically right after i used dry gas for the first time in awhile), tried putting dry gas, and starting when its been warmer out also.