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Old 10-18-2012, 06:42 PM   #1
Slow_2.5
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Location: El Paso TX
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2006 Jawny jawn
Burple

Default Boost issues

Alright guys I need some help. I am having issues with achieving boost in 1st and 2nd gears. The car is a 06 wrx with a VF22. In 1st gear at WOT I can only get ~10psi max where normally I can get 15 out of it. In 2nd gear I can only get it up to ~16psi where normally it will get to full boost which is 22psi. In 3rd - 5th it will hit full boost but it spools like a 40r. I just replaced the pre turbo exhaust gaskets as they were all leaking a bit but this did nothing. Any help would be greatly appreciated.
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Old 10-18-2012, 06:44 PM   #2
Slow_2.5
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Also the turbo has ~20k on it and is not exhibiting the normal dentist drill signs of a bad turbo.
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Old 10-18-2012, 07:38 PM   #3
holyjoetart
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Plugged air filter?
Vacuum leak?
BPV leak?
Waste gate sticking open?
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Old 10-18-2012, 07:56 PM   #4
RatedR
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I did this smoke test I saw on youtube where the guy uses a cigar and blows into one of the vacuum lines on the intake pipe. He then looks for where the smoke is coming out of. I found a leak on my inlet pipe, small, but enough to throw off the ECU to go into safe mode.
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Old 10-18-2012, 09:50 PM   #5
guygettnby
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2011 WRX
WRB

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Quote:
Originally Posted by RatedR
I did this smoke test I saw on youtube where the guy uses a cigar and blows into one of the vacuum lines on the intake pipe. He then looks for where the smoke is coming out of. I found a leak on my inlet pipe, small, but enough to throw off the ECU to go into safe mode.
Where was the leak out of curiosity? Were you knocking at all?
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Old 10-18-2012, 11:00 PM   #6
Slow_2.5
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Thanks for the help guys. I will get probing in the AM. how do you check to see if the wastegate is stuck open?
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Old 10-25-2012, 04:47 PM   #7
RatedR
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Right by the sleeve of the inlet pipe that covers the turbo. If the clamp moves, it sucks in air and has the car run lean. I got a used AVO extended inlet pipe, solved the torque loss problem.

PS - I dont smoke tobacco, stay HERBAL!

Quote:
Originally Posted by guygettnby View Post
Where was the leak out of curiosity? Were you knocking at all?
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Old 10-30-2012, 02:26 PM   #8
RatedR
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Here's a pic of my wife's sti's inlet pipe


This tiny hole made that boost fluctuation....i guess whenever it inched of the clamp.
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