i cant go past 15psi in any gear,i didnt do a boost leak test but i know my ic piping is not leaking and i checked every single hose so i'm starting to think its my dv valve. how do i know if its bad or not, should i flip it and see if it hold my 23psi??

i just cant figure it out for the life of me can someone please help

 

When did it start? before or after the ivey tune

 

way after!

 

Im assuming that you have the metal DV from the mr right? If so, ill say check that and the spring in your MBC.

 

make sure the lines for the mbc are still where theyre supposed to be then check all your piping again it might just be a tiny leak but sounds to me likes its you mbc

 

ok thanks guys!

 

I just had that same problem, only boosting to like 14 - 15 psi. It ended up being a plugged catalytic converter.

 

^^ i just put a test pipe in!

 

By flipping the valve, it would no longer be able to lift off its seat. So, yeah, this would be a good test as to whether or not your DV is wimpy and cracking at or before 15 PSI. I had an MR DV that would start lifting at 11#, so I crushed it in a vise.

 

LOL, yeah spark that is why i went and bought the Forge BOV with adjustable (RED=Hard) spring because i thought i had the same issue. IMO the MR DV wears out over time and then becomes weak in modded evos roughly over 400awhp.

 

also i noticed after installing my test pipe the car feels like it lost some down low power & turbo spools slower is this normal??

i had the perrin hi-flow!

 

Did you retune it yourself, or have it retuned(reflashed) after going from the HFC to the test pipe? You need to have it reflashed! It should spoolup faster, and not slower, after removing the CAT. CAT's are restrictive to exhaust gas flow, creating added backpressure which theoretically at least, would slow down turbo spoolup.