meangreen

I start my car and runs fine untill it gets in to hot loop then the ide goes up and down between 2000 and 500 rpm and i half to pedal it to keep it running, i switched the computer with a 89 with mass air but mines an 88 so i dont think that would have helped cuz of mass air setting but i tryed it. same problem so im not shure if my problem is electrical vacume or fuel related please help! thanks