sr20det stalling problem

[raptor727]

so i swapped my valve cover today and now i am having a stalling issue when coming to a stop. didnt do it before i swapped them. the reason i swapped them is because i had one powder coated. could a clogged or bad pcv valve cause this? or any other ideas? all vacuum lines are attached. at idle revs fine and idles fine. when driving fine when you first start driving but after a minute or 2 when coming to a stop it stalls. revs drop really fast it seems.

[raptor727]

cleaned maf and still the same doesnt want to idle when i come to stop. idles fine at start up only starts acting up after a minute or two of driving. any suggestions?