sometimes it idles low. like at 300-400rpm like its going to die on a full stop.. feels like it should its not pulling hard as it should. i did take out the secondry butterfly that black box i know i lose torque but gain a little hp on high end. i changed fuel filter cap rotor spark plugs manifold gasket throttle bottle gasket. i look up on forums. but it seems like no one have solved this problem that i know of.. please help motor is stock btw except for aem intake and type r pipping 2 1/4

 

Try cleaneing your throttle body and IACV. Also clean out the gunk that tends to build up under the idle adjustment screw

 

to the top will try that when i have time..hopefully sometime this week.

 

if you put a new intake mani gasket make sure all your vaccum lines are right, clean your IACV, and make sure you have the MAP sensor plug connected to the map sensor, and not the IACV and visa versa. if you've got your wiring backwards it could cause this.

 

but if i got my wirings backward wouldnt cause a check engine light to come on?