00 dx civic just swapped jdm b16 and every now and then the car stalls whenever i'm about stop or slow down. so far i've only lowered the rpm but i'm thinkin it may be a computer problem. i have no idea. just the other night when i was warming up my car it started to idle very low than back to normal then back low and stall. thought maybe a vacuum leak but it only happened that one night. just lookin for some advice or an explanation.