So my girlfriends 97 altima needed the intake gasket replacement. (surgging idle, popping out exhaust and reoccuring #4 cyl. missfire code (check engine light after long traffic jamb idle)). Spray can around #4 runner and injector smothed out the idle. Four evenings and approx. 16 hrs later its finished and idles smooth...followed jserrano thread and took my time... seperated the intake plenum for better access to the 10 bolts. I would like to raise the idle speed but the plastic sxcrew in the IAC just spins...Any ideas ? is it snapped off inside?