hi i got a 94 ls with gsr tranny. HPR headers.. short ram intake.. catback exhuast with turbo thrust muffler.. okay when i 1st start the car the car idles at like 2200 and drops down to like 1600 rpm up and down surging constantly.. when it warms up it runs smooth.. not a vaccum leak check all the vaccum lines.. well atleast none of them seems 2 be off or anything.. help me.. i'm thinkin i gotta clean something but not to familiar with integras..