I installed an open element k&n in take filter on my IX, along with a UNOS, tbe, AMS IC and LICP. My boost went from a steady 20 psi (stock air box and k&n drop-in) to hitting 16-17 psi until 5k rpm, then the boost would sky rocket way past 20 psi increasing with engine speed increase? Kinda wierd. Any ideas or similar experiences? Thanks.

-Dave

 

Search for the post "weird problem with UNOS" or something like that. That might be your problem.

 

Already read that thread. Its not the UNOS becuase I put the stock airbox back on and bosst is solid steady 20 psi. I also already cleaned and applied fully syn bearing grease to the UNOS.

 

Nobody knows why I can only control boost with the stock airbox?