HELP!!! up and down idle!
 

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

The idle problem could be a vaccum line most likely, does it sound like there is alot of air bein sucked, sort of like an exhaust leak??? or it could be the mass air . what size injectors do you have? is the mass air calabrated for those injectors? or it could be your Tps sensor might be bad, mine was bad and that is what was happened, let me know some more details and i think i can help you out