The reason why I ask is because I recently added a BBK Full and got tuned a few weeks ago. Prior to the tune and with the stock turbo, vacuum was sitting at around -13hg. Even on the drive with the new turbo to get tuned, it was sitting at the same vacuum. People told me vacuum shouldn't change with the turbo swap. But after the tune, this is what it's been sitting at.


My BOV (Tial QR) now flutters at full boost with the new set up. I got the 6psi spring with it, which according to every chart, is the correct one for my vacuum reading and the lowest I can go..

http://www.tialmedia.com/documents/BOVspc.png

Any help is appreciated.

 

Normal vac should be around -18 to -20. With cams it usually drops ( example 272's put you around -10). If your on stock cams, you have a big problem. The flutter is probably vac related at it works off a vac like. Have you done a boost leak test recently?

 

I am on stock cams..

 

You can do a boost leak test, make sure vac lines are good and secured, replace the PCV, its like a 3 dollar part. I would start here then see if it changes. EGR working properly? Any codes?

 

that is not normal for stock cams no

 

ohhh, maybe you have check lines vac and intake

Mine is 2jzgte, the vaccum is normal and work well.

 

Only CEL code I've gotten is for the O2 Sensor.. Cleared it.. Hasn't came back.

I'm going to check the vacuum lines.. How many vacuum lines are there total?

 

quite a few. PITA are on the intake manifold and underneath it. Check the EGR lines as well, those like to pop off from time to time. I see you got an 06, there was a TSB that came out his year for the P0420 code you got. Something to look into..

 

I have GSC S3's and a low idle and my vac is at 10. Youve got some issues to sort out.

Its likely a vacuum line behind and below the intake manifold. I always had a problem with one of them while it was there. It was one of the ones that leads off the throttle body.

 

The code I got was p2195..


Thanks for the help guys.

 

Check your vacuum line out or see if there is any cracked hoses. Like the other member suggested

 

Found it! Posting pics to help other members in case they have similar issues..





Thanks for all the help!

 

 

ohhh, perfect !!!

That's good, you could solve problem.

 

Now that the vacuum line issue is resolved, lets move onto discussions and feedback on the BBK!

Did you get the BB version? If not, what led you to choose the JB over the BB?