BmoreKnight

hello all i have a 85 firebird with a 2.8 v6 mpfi and need some help here if anyone could help me ok heres whats going on with it it died on me about 3 weeks ago and have been pulling my hair out to try and get it running again what it does is just spin most of the time but it seems like if i let it sit for a few days it will start up and sound great till it warms up and then i can't seem to give it any gas without it like its not getting any gas i have be told it could be the fuel filter which i did change and started right up but did the same thing when it got warm then i was told it was the mass air sensor and went out a bought the spray and cleaned it real good and started right up and did the same thing again when it got warm i also have new plugs and wires on the car but it seems like it don't wanna start just spin i have been trying to get it started cuz my wife wants to keep the car but we do have it listed on cl but can't seem to figure it out if anyone has this problem could u help out and tell me what u did to fix this