Idle issues please help
 

I was driving the other day. everything was fine. stopped at stop sign and car died. started back up idled weird and died again. Got it home but had to keep foot on the gas the whole time to keep it from dieing. it wont idle and it will die unless gas is pressed. when it is drving it feels like its missing like crazy. apex seal,comression and spark plugs are all good. any way it could be the mass air. any help or advice would be greatly appreciated. motor only has 4800 miles on it.

Tps?