don't have the AEM elbow... as far as the flutter, I have eliminated mine by letting the car warm up, and I bet ANY setup would have flutter without letting the car get properly warmed up... especially with the drop in K&N, etc... with the STOCK setup(stock filter, stock snorkel), no, you wouldn't hear it... it would still be there, just that setup is so quite it wouldn't be able to be heard

 

I still don't know what you guys mean by "flutter."

 

sounds like the "blow off" from the BPV... just repeated multiple times back to back, not as loud either

 

flutter:
http://www.youtube.com/watch?v=Vameb...eature=related

 

Dealer said it seems to be the bpv but they are blaming it on my after market exhaust and chargepipes......they are going to decide what they are goingto do tomorrow. They said I needed a bigger vacumme tank and I told themthey don't make such a thing. So when I got home, I bypassed it and it still did the same thing. They said that there is no vacumme leaks, and the bypass diaphram isn't ripped or anything. He said it's almost like it's the spring then he proceeded to ask me if I have an aftermarket spring, and I said he'll no.

Dunno what to do. They wanted to charge $200 for the visit but I said **** that.

I just dunno

Bump

Come on guys....... There's gotta be someone out there that's has/had the same or similar issue

 

This...I'm also curious

 

Ah. I definitely don't have that.

 

Me as well but so far no one has answered this.

 

I have had this as long as I can remember it with my car. I didnt think anything of it. But now maybe I should have?

 

Really.... Does it seem to be worse in the lower rpm in first gear?

 

yes, and I catch it in other gears too. Specially if I get on the gas when my RPMs are lower and I let off.

 

Good to see that I'm not alone. Do you have a k&n drop in by any chance

 

All stock other then SC tune. I never really thought anything of it until this thread.

 

Hmmmm that's odds.... I never noticed this until I got my stage 1 kit in

 

I had the AEM CAI in and it was pretty bad, but got much better when I went back to the stock elbow. But, it is worst for me at WOT in 3rd around 2.5k rpm (or 3.5k, I can't remember). I've been told it is more annoying than dangerous but I still like multiple opinions...

 

You get this with the stock intake??? I'm just worried about it being dangerious that's all.

 

Term, I'm switching back this weekend. I'll let you know if I feel a difference.

 

I have the stock elbow attached to the AEM CA tube. I don't know if I get it with only the stock intake.

 

I went out and checked all vac lines and they are connected and fine. The clamps on the charge pipes are fine, on both the hot and cold side. Just did the tank bypass mod again this time I disconnected my battery. When I tried it yesturday, the car was boggy and acting wierd. I don't think the k&n filter would cause the issue, it would just magnafy the sound if anything. Again, it only does this once I'm under 0psi. Anything above that it's fine. I made an appt at the dealer I bought the car from, it's on April 5th because the other dealer tried to **** me over. I'm leaning towards the bpv.

If anyone has a spare one that they could send me so I could try it just so I can narrow it down. Other than that I'm running out of patients.

 

Bump

 

Bump.... I'm gonna take the bpv apart myself this weekend. Any tips or tricks.

Also with the gm stage 1 kit, I'm only boosting 20 kpa in first gear. I that normal?

Can someone please help me. I took the bpv apart and the rubber thingy isn't ripped, not sure if the spring is ok or not, because I have nothing to compare it to.

Also. Would my upper charge pipe or intercooler cause the turbo bpv to flutter(surge)?? I'm debating on whether or not to put my stock intercooler and stock charge pipe back on...

 

Reduced boost in 1st is normal due to torque management, if the diaphragm isn't ripped then I believe all is well. Doubtful the spring went bad.

CP's & intercooler shouldn't cause surging.

 

I flashed back to stock and the issue was gone. So it must just have to do with the higher boost.


Its only when you let of the gas right?

 

Yeah it only does it when I let off the gas under 0 psi. Now the dealer said that they hooked up a vacuum pump to the bpv and when it had more vacuum, the issue was gone.

So maybe there is a vacuum line that's bad. Kinda makes me wonder if I bypass the solenoid, it if would be any better

What are you boosting. Psi wise

 

Well, today I'm gonna go buy some rubber hose and some vacuum caps and bypass the solenoid. If that doesn't work I'm gonna spray all the coupler and the intercooler with soapy water to see if I have leaks there. If that doesn't wok them I'll take off all the vacuum lines and replace them with new hose. If this doesn't work then I'm out of ideas.... Then I have literally tried everything besides swapping bpvs with someone.

Could there also be something wrong with the wastegate actuator? Orthe waste gate itself?