97 Nissan Pickup intake not wrkin right
 

I recently bought a Weapon R Intake which came with a new air box to replace factory. I hooked pretty sure evrything was hooked up right and tightened to prevent air leakage. For some reason my truck wants to kinda girgles from tail pipe and doesnt wanna stabilize and the rpms kinda wanna die like its not getting enough power. Any ideas would be greatly appreciated, its a 2.4l 4cycl 4wd?