I just installed a VDO NewSouth gauge and I am having a BIG problem... It seems that I hold about 19-20 vacuum yet when I give it gas (driving), I get ZERO PSI! My car is slower than a bus! I have the Speedtuning chip and have not seen any improvements with it installed.. I think I hear a hissing sound coming from the area over the intake manifold... Any other advice? Please don't tell me my turbo crapped out =/

 

Check for codes.

 

check right above the red hose, on the bigger part of the hose see how its connected. I'll bet its loose so when you push down on the gas, it disconnects and loses a ton of air. I had to replace that hose, is it a noticable loud hissing noise?

 

Ok guys, just got back from Autozone. The guy who scanned it got an all OK. While in gear the vacuum is almost perfect- about 21-22. And yes, A4speed , I do have a loud hissing noise which I noticed once I removed the valve cover.

 

buy that new connecting hose, replace it, and see what your psi goes up to then. that hissing noise is making you lose a ton of performance. just to check to make sure its that hose, tie some wire on each side of the connector to keep it together so when you drive your car, it can connect the hose long enough to see if thats what the issue is.

 

and no, your turbo has not crapped out on you

 

Ok just found something out.. Here is what happened when I just touched this hose: (Sorry about quality)
http://img265.imageshack.us/my.php?i...8081811hq8.jpg
Now, can you guys tell me the inner diameter so I can find another one? Thanks!

 

Update: Changing the connecting hose has still not helped.. =(

 

In normal case zero boost means boost leak. You should check evey and each connection beginning from air box to the intake manifold.

We start to hear some problems with this chip lately so chip could be the problem too.

Check you sparts plugs to see if they are all blacked out.

 

Thanks for the advice.. Could this be limp mode by any chance? Can this be the effect of the N75 valve?
God, now I wish that I simply stayed with stock programming =/..