You got to check this video out of a test I performed. In the video I called the pressure tank the wrong name. I called it the vacuum tank. I meant pressure tank.


http://www.youtube.com/watch?v=OfAlNNPGtXo

 

Congrats on finding the problem!

 

That's pretty rare but glad you found the problem.

thewird

 

thats pretty cool, good work finding that leak.
hell i'm goona test mine just cause you never know...

 

what were your symptoms?

 

Brilliant testing procedure.

FAQ has been updated with a link to this thread.

 

symptoms were secondary boost drop off through the gears. At 4500 RPM My boost whent to 5,6,7 if lucky. The only way I could get the secondary up to full boost was to drop a gear and floor it. Bottom line it had a pretty substantial leek. I have'nt put a new one on yet but i will in a couple days. I'll post a reply regarding if it helped or solved the secondary boost issues

 

Just out of curiousity, why aren't you checking these lines/tanks with pressure and boost gauges instead of in the bathtub?

 

i dont own any gauges yet. and even still I would do it this way because it is very easy to spot even a slow leak

 

Good find. The test of disconnecting the vacuum line to the pressure chamber and hearing the "woosh" is the first thing to look at. If that holds true, you've got a good tank, check valve, and solenoid in the circuit.

You could also cap one nipple and hook a MityVac to the other one - apply vacuum, if it leaks down, there ya go. But, it doesn't make a good Youtube video.

I hope you have my Viton check valves as well .

Good stuff!

Dale