alright, i had this problem before, but it was not so severe...
today my car decided to start having this problem again, where out of nowhere you feel the car start to stall and if you hit the gas too fast, it just craps out, and somtimes you can start it again...and somtimes it just wont start..but yeah i have it in my garage right now, and when i start it, it revs up like usual, and then drops to jjjjjjjjjjjust over 0 rpms, revs up again (sounds like its really dying or somthing) and then stalls out, liek its fighting to get a steady idle, but it cant. several hypothesis have been sparkplugs misfiring, fuel injector cloged (but i just dumped fuel injector cleaner in today (1 whole bottle). ANYONE HAVE ANY IDEAS, AND IF SO, HOW DO I FIX IT.

 

check ur egr valve

 

it could be clogged

also the vacuum lines around it

 

Also, the fuel filter, or the pcv valve. It could be many things. Does your check engine light come on?

 

yeah i got it fixed, it ended up that the air filter i put on the engine block shorted out a sparkplug somehow, and the clip that connects the air sensor in the intake hose was broken, or it wouldnt fully clip in place, had i shell out about 400 greens for that repair

 

also check your mass airflow censor, it could be dirty, my friends mx6 did this also, it would just stall, and idle real low.