GOING CRAZY

OK, so I can not figure out for the life of me whats going on with my 92gt.. wasd riving fien. came out and cranked it in the morning,started out idling rough and would cut off. I would feather it to get a rpm up, would idle rough to 400-600 rpms.then when driving it would sputter bad and i couldnt accelerate at all. so I replaced the idle air, maf,tps,plugs.. I did replace the plugs and headers to long tube, I have to put the 02 in this weekend. my issue now is that when I hook the maf up, it will idle ok but I cant drive it. when I acclerate it will do ok to 2800 rpms, then just cut out like theres no power. when I let off the gas it will idle back to around 8-900rpms. so i am driving it around wiithout the maf hooked up..burning gas like crazy and still just isnt right..I had all factory parts when tis first happened. replaced the plugs and idle air and maf..figured I may as well put the headers on since i am working on it. i have no vauum leaks,fixed the ones it had.
so now I drive around with out the maf, it doesnt drive to great. every now and then it will cut off when slowing to a stop or at a stop.. any ideas where to go next or what to look for,I havent checked the egr yet.. it did throw codes-081/083/066/063.. when I replaced all the arts and hooked maf up it went off. but i cant drive it with the maf hooked up so check light is on?
ANY HELP WOULD BE GREAT...

o o how long should I leave it unhooked.. usaul 5 mins or so?

what would cause the maf to make it idle bad when acclerating?? drives ok with it off, crappy when its on, wants to cut off when i get around 2800 rpms.. i have to lket off gas

Yeh got a new filter.new plugs,idle air,maf,gps.can find any vacuum leaks..someone said it could've jumped timing..man I so freaking stumped.drives ok with out maf plugged in.plug it in and it immediately drives horrible and will cut off if u can even drive it.

I don't have the 02 in right now.just put headers on and have to drill the holes then put them in.but 02 shouldn't have anything to.do with the maf sensor right..

I am replacing them this sat. I have to drill out the hole in the new header for them. I didnt think the 02's would affect the car this bad. they usaully just throw a cel, right?? the only thing i can think of next is a new coil and injectors

WILL DO IT SATURDAY AND LET YOU KNOW WHATS GOIGN ON THEN...THANKS