Originally posted by 97TSI
ill start off by saying that my bov is recirculated to avoid that as somones answer
HKS SSQV
ive always suspected my ssqv of leaking due to its 2+ yrs old..well i took it apart yesterday. Wut i found on the inside was kinda odd. The 2 valves on the inside had come apart..the bigger black valve has 4 peg holes that it sits in to keep it snug with the small purple valve...well the black valve was complety out of all the peg holes just hanging out in there not sealing properly when it would blow off so my next shift i would leak all the pressure out, so now i fixed that problem by seating the valve back into the peg holes and now it seals properly....BUT now when im driving i get this stumbling flutter noise between shifts it also feels like my car falls on its ass..while im boosting and i let off my RPMS will drop drastically between shifts(and yes it is recirculated) and i hate the way my car drives now when i shift it feels like i hit a brick wall..im not sure if this is comp. surge or just the nature of the BOV..but only other time ive heard this is sound is when i first put it in.
Have you checked under the hood since you re-installed it. It may be possible that the BOV may not be tightened all the way, or may have even blown out of the pipe. That happened to me one time when I took my SSBOV off and reinstalled it. My car ran liek crap between shifts and even stalled. Limped it back home from my neighborhood entrance (where the problem occured), and popped the hood. Found the BOV pooped out of the I/C/ pipe. Make sure that thing is tightened down good. Also make sur ethe vac line is connected. Check for any other leaks and also check to see if there is a possible kink in the recric. hose for your BOV.
Also, have you tampered with the adjustment screw at all on the BOV? If so, that may be the source of the problem as well. Since it was running fine before you took the BOV apart, it's most likely BOV related. I'd also check the diaphragm of the BOV one more time too, if the above symptoms don't seem to be apparent.