I'am experiencing some weird boost issues, take a look at the pic

http://pg.photos.yahoo.com/ph/mrothr...ec.jpg&.src=ph

vary choppy primary boost and a delay in the transition. i was thinking maybe my check valves.

** down pipe, rb dual cat back, pfc obviously **

 

what is the boost pattern?

 

i dont have a boost gauge just the pfc.... also i should mention that i'm not using my under tray, its probably vital for air flow but it wouldnt cause this. the reasoning for leaving it off is just to fix the problem first (so i dont have to remove it every day)

 

Get a boost gauge, even if it's a cheap POS from the auto parts store.

All I can see from your PFC screenshot is that it looks like it takes you one hell of a long time for you to get any boost.

 

May have just been my air filter. I will confirm that when my K&N comes in next week.