Hello all,

I purchased my first Audi a couple months ago and have slowly been repairing/upgrading random parts on it. I always thought I had boost problems as it seem a bit slow even for stock. Long story short, finally installed a VDO boost gauge and I'm only getting about 4.5lbs of boost in 1st through 5th gear ( no spikes or nothing lower ) but starts to drop off around 5000 rpm which I know is normal.

I have replaced the vacuum lines going from the FPR to Intake Manifold and the line going from top of diverter valve to intake manifold (this is the line I used to T connector to the boost gauge from) I check other lines underneathe the intake manifold going to the airbox for corrosion with no success.

Any help appreciated, thanks!

Oh yeah, car is a 1997 a4 1.8t manual (140,000k)

 

You might want to use a proper way to find a boost leak, check out chocalotstarfish's DIY:

https://www.audiforums.com/forum/sho...12#post1225912

 

I'll check that out. Thanks

Also I do not have a Check Engine Light .

 

You should be seeing around 8psi. When the wastegate arm on the turbo on my 97 was snapped, causing 0 boost, I didn't have a cel. Could be a few things. Start with that link.

 

Okay so I think I will proceed with the Tennis ball leakdown test method but will have to wait until later this week to get ahold of an air compressor.

I tightened all vacuum hoses I could find but did notice that the wastegate hose didn't have a clamp on it at all although it feels pretty tight on the nipple connection.

Could not having a clamp or zip tie on the wastegate hose coming off the wastegate cause a leak or is it nothing to worry about?

Thanks,