Sputter and Stall

89StangGT50

Founding Member
Sep 25, 2001
178
0
17
TX
Hey guys, I just brought my 88 GT out of the garage after about 2 weeks of sitting, i only ran it once in between then and it was fine. I brought it out today, and it stalled, so i went and filled it with premium. And still HORRIBLE. If you step on the gas more than a faint touch, it sputters like hell, it wont idle for ****, it will stay around 1000 then drop to 500 then stall, the whole engine is kicking around. Its a 306 with about 15000 miles on it, all new stuff. Any ideas? I tried resetting the computer, checked timing, fuel pressure is fine.

edit*** now it wont even start, it sputters as its starting, it cranks and for a split second stops cranking then starts again, it sounds BAD