Ok, WTF !??!!?

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?image=0208081811hq8.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.

quote:

ORIGINAL: aRIf

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 =/..

are you running a stage colder plug that is gapped right?
 
when you connected your boost guage, did you reconnect the other end?
 
you need to double check all your hoses....... do you still hear a hissing noise?

quote:

ORIGINAL: turbo kraut

are you running a stage colder plug that is gapped right?

when you connected your boost guage, did you reconnect the other end?

you need to double check all your hoses....... do you still hear a hissing noise?

I don't know what plugs im running even , this car is new to me. I did reconnect the other end and I double checked EVERY hose today. I got a bit frustrated so I tried running with the MAF disconnected and I actually got it to boost to 2psi. Even though I have no knowlage on the N75 valve or the wastegate actuator, I think that they might have something to do with this. What are your thoughts on this?

Limp mode means you could not go over 5psi at WOT. Since you have Zero boost, then there is something wrong.
 
Hissing could be coming from T fitting on boost gauge. Look at your T fitting.
 

SpeedTuning chip works awesome for me! It does blow lines off though with reused clamps and high PSI. I've gotten lots of leaks, but its not a direct cause of the chip.

sounds like you have a super sh!tty boost leak....im sure if you search for the diy on here you'll find it fairly easily

your turbo probably has probably not crapped out on you...

if I was you I would start the car and get my ears as close as possible to the motor and find the boost leak, since it's a boost leak you will only hear it under pressure (boost)...you may want to let it warm up and rev it up a bit in Neutral...

our cars usually boost to about 4 psi while sitting still, but it sounds like the leak would definately be audible over the engine noise..

gl!

post a pic of your T for your boost guage...I'd like to see how you have it set-up

Take a look at the check valves. The one on top of the airbox on my car was pretty much destroyed on the bottom part of the valve. You couldn't see it from the top. You will still get a normal vacuum reading but it will leak like no other when you hit the gas. THere are a few other ones on the car as well so look around at those also. I think there is one under your intake manifold as well.

Josh

Sorry for the delay guys.. Right now I am looking into checking the N75 valve.. I'll keep you updated.