idle problem.... help

[s13b6]

i have a 91 S13 the car idle ok but it stall while decelarating or just after stopping.. every time when i put it in to netual the car will stall...

i have check the timing, plugs, and ect...

need help.......

[gyfer]

oxygen sensor ?air filter ?fuel filter ?MAF ?any engine error code ?

[s13b6]

i have the O2 sensor, MAF, and there is no engine code...

i have another question.. i know i have my boost sensor unhooked, can any one tell where the vacume lines should be ran...that might be the problem.