Ive been having this problem for awhile but now its starting to happen more and more and usually when it acts up I can just keep my foot on the gas and break at the same time and drive it around for a min or two then it will act normal again well now not only is it happening more and more frequently its lasting longer and the riding arounds not fixing it. I'll try and crank my car and it wont crank you have to keep your foot on the gas and break to keep it going if you let off it will die imedently or it will stumble badly then die. I was told it could be one of four things the EGR the o2 sensors the throttle position sensor or the idle air control valve which one do you guys think it could be?

 

Make sure your MAF's clean & check for vaccum leaks. I'd start there first before getting a tune up.