I just got done intalling my Cobra upper and lower intake, and it idles like crap now. Somethings definetly not right. I drove it around the block and when i have my foot on the gas it runs smooth but as soon as i let off the gas, it rides like crap. I can hear something leaking from the back of the Intake, it sounds like air and water leaking out, a bubbly sound. That leads me to think that coolant is leaking from the back of the lower intake, whould that mean theres a serious vac leak to? Whadda you guys think? Also its shooting out alot of thick smoke under idle, what could that be?