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Porsche 997 Turbo no boost (Only 0,6bar - 87psi)

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Old May 31, 2018 | 01:09 PM
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Porsche 997 Turbo no boost (Only 0,6bar - 87psi)

My turbo only has 0,6bar (should be about 87psi?)

I have checked for leaks, but couldnt find one.

The vtg units works and i can move them by hand.

What can i do to check what the problem could be?
 
Old May 31, 2018 | 01:50 PM
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How did you check for leaks? A pressure test? 87 psi would blow all your hoses off.
 
Old Jun 1, 2018 | 01:47 AM
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Yes a pressure test with 1,5bar
 
Old Jun 1, 2018 | 01:47 AM
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Ok, 0,6bar should be around 8psi?
 
Old Jun 1, 2018 | 04:31 AM
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Did you check the boost blow off valves. Has any work been done on the car recently.
 
Old Jun 1, 2018 | 05:00 AM
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Sounds like you have a leak somewhere, would pressure test again and check, don't exceed 28PSI during your leak test. But you want to test atleast upto 25PSI.

​​​​​https://www.6speedonline.com/forums/997-turbo-gt2/297625-boost-leak-test-997-1-turbo.html

Post #8 in the thread above shows how I pressure test.
 
Old Jun 1, 2018 | 07:57 AM
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.6 bar is limp mode. do you have any stored codes? try resetting ecu with battery negative off for 15 min.
 
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Old Jun 2, 2018 | 05:05 AM
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I read out the dme with piwis2 - there is an error p0018 writen down.

When i run the car and log the cam - i see that it is permanent -14,5° and it wont change when i put the pedal down - The other side works.

But i think that error wont be related to no boost?

I only have piwis2, but i think with that i cannot log?

I made a pressure test and it holds 1,5bar for about 5minutes, after that it is around 1-1,1bar.

How can i test the blow off valves?
 
Old Jun 2, 2018 | 05:49 AM
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Originally Posted by prodigymb
.6 bar is limp mode. do you have any stored codes? try resetting ecu with battery negative off for 15 min.
Thanks for this info about the limp mode, I never knew that.
 
Old Jun 4, 2018 | 09:49 AM
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Any tips what i can check?
 
Old Jun 4, 2018 | 10:06 AM
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I'm not the most knowledgeable about this but if your cam reading is stuck in one bank and the other bank's cam is operating within parameters could it not be a spun camshaft and thereby causing the limp mode? I have heard of a few instances where it has partially spun but the car seems to operate like normal except for boost being cut. Have you looked up the code (P0018)?

It sounds like you don't have a boost leak.
 
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