very low idle
my 2002 wrx AT, in a stop sign or whenever i stop and either have it in N, D, or P...at rest it idles very low. around 200 to 500 rpm. feels like the car is going to stall, it has stalled about twice, but other wise it just idles low. the low idle also cause the car to shake, enough so the driver and passenger can feel their bodies moves. anyone know what is wrong or how i can fix this problem? will better grounding be an option?
no serious mods, just a K&N filter, GFB hybrid valve, and STi exhaust. The low idle was always there before any of this mods where done to gein with.
SOME ONE PLEASE HELP ME, i will appreciate any comments. The vibration make me feel like im in a very old domestic car.