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Old 09-28-2013, 04:45 PM   #1
carsfeverguy
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Boost Pressure Test - urgent help video



I know it is saturday afternoon, my apologies. After my recent thread, decided to go ahead an do a pressure test. I made myself a tool using a valve and some homedepot parts, using info I have read.

Anyway, hooked up straight to the turbo, and as can be seen in the video, the pressure gets stuck at 11-12psi. I took the oil cap off as a precaution as instructed... but even with it on, it doesn't get any higher...

I sprayed water with lots of soap but no bubbles at any of the junctions.

Please help me.

Last edited by carsfeverguy; 09-28-2013 at 05:04 PM.
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Old 09-28-2013, 05:03 PM   #2
Bruh Man
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what did you do with the PCV?
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Old 09-28-2013, 05:10 PM   #3
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I did nothing else...
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Old 09-28-2013, 05:16 PM   #4
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I did nothing else...
IIRC the rear PCV needs to be blocked off
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Old 09-28-2013, 05:25 PM   #5
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How would i do that?
I tried blocking the entry above the turbo with my finger, but nothing...
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Old 09-28-2013, 05:28 PM   #6
carsfeverguy
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if I close the oil cap, and then open you can hear air being released... but it doesn't build to 20 something as it should.
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Old 09-28-2013, 05:30 PM   #7
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and what was the point of hooking up straight to the turbo if the rear pcv valve recirculates...
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Old 09-28-2013, 07:30 PM   #8
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anybody?
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Old 09-28-2013, 11:42 PM   #9
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Quote:
Originally Posted by carsfeverguy View Post
if I close the oil cap, and then open you can hear air being released... but it doesn't build to 20 something as it should.
It never will using that wimpy compressor.....There is a ton of leakage past the throttle body, PCV and through the valves and engine. You need a lot more air volume to really pinpoint leaks (over your 11 psi.). It's not like you're pressurizing a sealed system..
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Old 09-28-2013, 11:50 PM   #10
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Oh boy, red in the cheeks as i'm typing this....
Need to find someone with a real compressor...
The pressure does drop off as soon as I shut that thing off...

Couldn't see any bubbles at 11psi, an that damn compressor is so loud, i couldn't hear anything....
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Old 09-29-2013, 07:31 AM   #11
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It never will using that wimpy compressor
Would this suffice?

http://www.harborfreight.com/pancake...psi-60637.html
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Old 09-30-2013, 10:55 AM   #12
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If you have a jack, lift up the car and take a look at the turbo from underneath. Inspect the turbo outlet, turbo outlet pipe (pancake), and look for oil anywhere near the turbo.
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Old 10-13-2013, 11:27 PM   #13
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SO I thought I had solved this, but tough luck I guess. It is really starting to make me mad...
I have included logs, any help is appreciated.
I went ahead and bought a 2 gallon compressor with a pressure regulator but it wasn't much help since it only gave me maybe a minute of silence with air feeding in the system... and it would need to restart as it would go down to 0...

From the logs, can anyone deduce what is wrong?

It worked good for 2 days after my latest upgrade the DV+

How is the N75 looking?
Can anyone help?

I need a place with a smoke test in Toronto...tough luck...

Screen shot 2013-10-13 at 11.19.30 PM by tudorior, on Flickr
Attached Files
File Type: zip oct 12-LOG-01-03F-20F-311-1148-115C.xls.zip (12.3 KB, 24 views)
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Old 10-14-2013, 08:22 AM   #14
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I'm not expert, but it looks better than my n75. Mine is pegged at 100% :\

What mods do you have? Done any work recently?

I would get under the car and visually check the turbo for any drops of oil or indications of oil. If you see oil, then that would likely be the source of your leak. If you can't do this, then take it to a performance shop around you that has a smoke machine for boost leak testing.
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