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help! head leaking boost?!?!?

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jmakado

15+ Year Contributor
172
2
May 7, 2004
Capistrano Beach, California
i have a mystery boost leak right now and i can't find it to save my life! i only get 2psi at the gauge (intake mani) and air comes out of the exhaust.
i pulled my egt probe and did the test again: their is a delay from when air goes in the compressor and out of the exhaust mani......this makes me think that it is making its way through all the intercooler piping, TB, intake mani., head, and then into the exhaust. WTF??? i have tried turning the engine over a few times and the same happens. any ideas?
 
Make sure the engine isn't at TDC. I forget exactly the valve timing but I think 30 degrees before or after is fine for making sure that no more than one set of valves per cyl are open at a time. At TDC the cyl beginning it's intake stroke will have both set of valves open due to overlap.

It thats not it, then it's time for a compression and leakdown test.
Steve
 
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