hey, i have a 2007 shelby gt 500. i have adde a steeda cold air kit, and a predator tune, with 2.6 pulley from steeda, and magnaflow exhaust. the car when you come to a stop doesn't drop the idle back when you pull in the clutch, but stays around 1100-1200 then after roughly 6-7 seconds finally lowers down to correct idle speed. is this normal? i don't seem to remember it doing that when stock intake and tune was in car. also i have checked for air leaks in the plastic, any where where connections are, find none. no codes produced either. any of you out there have this symptom? thanks for any help.
